boards/avr/atmega: migrate to SPDX identifier

Most tools used for compliance and SBOM generation use SPDX identifiers
This change brings us a step closer to an easy SBOM generation.

Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com>

boards/avr/atmega/amber/include/board.h

@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/avr/atmega/amber/include/board.h
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

boards/avr/atmega/amber/scripts/Make.defs

@@ -1,6 +1,8 @@
 ############################################################################
 # boards/avr/atmega/amber/scripts/Make.defs
 #
+# SPDX-License-Identifier: Apache-2.0
+#
 # Licensed to the Apache Software Foundation (ASF) under one or more
 # contributor license agreements.  See the NOTICE file distributed with
 # this work for additional information regarding copyright ownership.  The

boards/avr/atmega/amber/scripts/amber.ld

@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/avr/atmega/amber/scripts/amber.ld
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

boards/avr/atmega/amber/src/Makefile

@@ -1,6 +1,8 @@
 ############################################################################
 # boards/avr/atmega/amber/src/Makefile
 #
+# SPDX-License-Identifier: Apache-2.0
+#
 # Licensed to the Apache Software Foundation (ASF) under one or more
 # contributor license agreements.  See the NOTICE file distributed with
 # this work for additional information regarding copyright ownership.  The

boards/avr/atmega/amber/src/amber.h

@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/avr/atmega/amber/src/amber.h
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

boards/avr/atmega/amber/src/atmega_boot.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/avr/atmega/amber/src/atmega_boot.c
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

boards/avr/atmega/arduino-mega2560/include/board.h

@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/avr/atmega/arduino-mega2560/include/board.h
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

boards/avr/atmega/arduino-mega2560/scripts/Make.defs

@@ -1,6 +1,8 @@
 ############################################################################
 # boards/avr/atmega/arduino-mega2560/scripts/Make.defs
 #
+# SPDX-License-Identifier: Apache-2.0
+#
 # Licensed to the Apache Software Foundation (ASF) under one or more
 # contributor license agreements.  See the NOTICE file distributed with
 # this work for additional information regarding copyright ownership.  The

boards/avr/atmega/arduino-mega2560/scripts/flash.ld

@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/avr/atmega/arduino-mega2560/scripts/flash.ld
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

boards/avr/atmega/arduino-mega2560/src/Makefile

@@ -1,6 +1,8 @@
 ############################################################################
 # boards/avr/atmega/arduino-mega2560/src/Makefile
 #
+# SPDX-License-Identifier: Apache-2.0
+#
 # Licensed to the Apache Software Foundation (ASF) under one or more
 # contributor license agreements.  See the NOTICE file distributed with
 # this work for additional information regarding copyright ownership.  The

boards/avr/atmega/arduino-mega2560/src/arduino_mega2560.h

@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/avr/atmega/arduino-mega2560/src/arduino_mega2560.h
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

boards/avr/atmega/arduino-mega2560/src/avr_boot.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/avr/atmega/arduino-mega2560/src/avr_boot.c
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

boards/avr/atmega/arduino-mega2560/src/avr_leds.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/avr/atmega/arduino-mega2560/src/avr_leds.c
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

boards/avr/atmega/mega1284p-xplained/include/board.h

@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/avr/atmega/mega1284p-xplained/include/board.h
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

boards/avr/atmega/mega1284p-xplained/scripts/Make.defs

@@ -1,6 +1,8 @@
 ############################################################################
 # boards/avr/atmega/mega1284p-xplained/scripts/Make.defs
 #
+# SPDX-License-Identifier: Apache-2.0
+#
 # Licensed to the Apache Software Foundation (ASF) under one or more
 # contributor license agreements.  See the NOTICE file distributed with
 # this work for additional information regarding copyright ownership.  The

boards/avr/atmega/mega1284p-xplained/scripts/ld.script

@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/avr/atmega/mega1284p-xplained/scripts/ld.script
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

boards/avr/atmega/mega1284p-xplained/src/Makefile

@@ -1,6 +1,8 @@
 ############################################################################
 # boards/avr/atmega/mega1284p-xplained/src/Makefile
 #
+# SPDX-License-Identifier: Apache-2.0
+#
 # Licensed to the Apache Software Foundation (ASF) under one or more
 # contributor license agreements.  See the NOTICE file distributed with
 # this work for additional information regarding copyright ownership.  The

boards/avr/atmega/mega1284p-xplained/src/avr_boot.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/avr/atmega/mega1284p-xplained/src/avr_boot.c
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

boards/avr/atmega/mega1284p-xplained/src/avr_leds.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/avr/atmega/mega1284p-xplained/src/avr_leds.c
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

boards/avr/atmega/mega1284p-xplained/src/mega1284p_xplained.h

@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/avr/atmega/mega1284p-xplained/src/mega1284p_xplained.h
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

boards/avr/atmega/moteino-mega/include/board.h

@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/avr/atmega/moteino-mega/include/board.h
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

boards/avr/atmega/moteino-mega/scripts/Make.defs

@@ -1,6 +1,8 @@
 ############################################################################
 # boards/avr/atmega/moteino-mega/scripts/Make.defs
 #
+# SPDX-License-Identifier: Apache-2.0
+#
 # Licensed to the Apache Software Foundation (ASF) under one or more
 # contributor license agreements.  See the NOTICE file distributed with
 # this work for additional information regarding copyright ownership.  The

boards/avr/atmega/moteino-mega/scripts/ld.script

@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/avr/atmega/moteino-mega/scripts/ld.script
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

boards/avr/atmega/moteino-mega/src/Makefile

@@ -1,6 +1,8 @@
 ############################################################################
 # boards/avr/atmega/moteino-mega/src/Makefile
 #
+# SPDX-License-Identifier: Apache-2.0
+#
 # Licensed to the Apache Software Foundation (ASF) under one or more
 # contributor license agreements.  See the NOTICE file distributed with
 # this work for additional information regarding copyright ownership.  The

boards/avr/atmega/moteino-mega/src/avr_boot.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/avr/atmega/moteino-mega/src/avr_boot.c
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

boards/avr/atmega/moteino-mega/src/avr_leds.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/avr/atmega/moteino-mega/src/avr_leds.c
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

boards/avr/atmega/moteino-mega/src/moteino_mega.h

@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/avr/atmega/moteino-mega/src/moteino_mega.h
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The