libs/libdsp: 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>

libs/libdsp/CMakeLists.txt

@@ -1,6 +1,8 @@
 # ##############################################################################
 # libs/libdsp/CMakeLists.txt
 #
+# 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 ASF licenses this

libs/libdsp/Makefile

@@ -1,6 +1,8 @@
 ############################################################################
 # libs/libdsp/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

libs/libdsp/lib_avg.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * libs/libdsp/lib_avg.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

libs/libdsp/lib_foc.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * libs/libdsp/lib_foc.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

libs/libdsp/lib_foc_b16.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * libs/libdsp/lib_foc_b16.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

libs/libdsp/lib_misc.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * libs/libdsp/lib_misc.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

libs/libdsp/lib_misc_b16.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * libs/libdsp/lib_misc_b16.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

libs/libdsp/lib_motor.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * libs/libdsp/lib_motor.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

libs/libdsp/lib_motor_b16.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * libs/libdsp/lib_motor_b16.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

libs/libdsp/lib_observer.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * libs/libdsp/lib_observer.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

libs/libdsp/lib_observer_b16.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * libs/libdsp/lib_observer_b16.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

libs/libdsp/lib_pid.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * libs/libdsp/lib_pid.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

libs/libdsp/lib_pid_b16.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * libs/libdsp/lib_pid_b16.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

libs/libdsp/lib_pmsm_model.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * libs/libdsp/lib_pmsm_model.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

libs/libdsp/lib_pmsm_model_b16.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * libs/libdsp/lib_pmsm_model_b16.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

libs/libdsp/lib_svm.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * libs/libdsp/lib_svm.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

libs/libdsp/lib_svm_b16.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * libs/libdsp/lib_svm_b16.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

libs/libdsp/lib_transform.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * libs/libdsp/lib_transform.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

libs/libdsp/lib_transform_b16.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * libs/libdsp/lib_transform_b16.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