Add SPDX license identifiers to driver entry point files

Signed-off-by: Aditya Deshpande <aditya.deshpande@arm.com>

3rdparty/p256-m/p256-m_driver_entrypoints.c

@@ -1,3 +1,23 @@
+/*
+ *  Driver entry points for p256-m
+ */
+/*
+ *  Copyright The Mbed TLS Contributors
+ *  SPDX-License-Identifier: Apache-2.0
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License"); you may
+ *  not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
 #include "mbedtls/platform.h"
 #include "p256-m_driver_entrypoints.h"
 #include "p256-m/p256-m.h"

3rdparty/p256-m/p256-m_driver_entrypoints.h

@@ -1,3 +1,23 @@
+/*
+ *   Driver entry points for p256-m
+ */
+/*
+ *  Copyright The Mbed TLS Contributors
+ *  SPDX-License-Identifier: Apache-2.0
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License"); you may
+ *  not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
 #ifndef P256M_DRIVER_ENTRYPOINTS_H
 #define P256M_DRIVER_ENTRYPOINTS_H