mimxrt10xx: Add license for NXP code

Author: arturo182

ports/mimxrt10xx/peripherals/mimxrt10xx/MIMXRT1011/clocks.c

@@ -23,6 +23,12 @@
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  * THE SOFTWARE.
  */
+/*
+ * Copyright 2019 NXP
+ * All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
 
 #include "mpconfigport.h"
 

ports/mimxrt10xx/peripherals/mimxrt10xx/MIMXRT1062/clocks.c

@@ -23,6 +23,12 @@
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  * THE SOFTWARE.
  */
+/*
+ * Copyright 2019 NXP
+ * All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
 
 #include "mpconfigport.h"