Cleanup license text in Xtensa XCC and Xtensa ESP32 GCC ports.

Add SPXD license identifiers.

portable/ThirdParty/XCC/Xtensa/portmacro.h

@@ -1,9 +1,10 @@
 /*
  * FreeRTOS Kernel <DEVELOPMENT BRANCH>
+ * Copyright (C) 2015-2019 Cadence Design Systems, Inc.
  * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
- * SPDX-License-Identifier: MIT
- *
+ * SPDX-License-Identifier: MIT
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
  * the Software without restriction, including without limitation the rights to
@@ -26,29 +27,6 @@
  *
  */
 
-/*
- * Copyright (c) 2015-2019 Cadence Design Systems, Inc.
- *
- * Permission is hereby granted, free of charge, to any person obtaining
- * a copy of this software and associated documentation files (the
- * "Software"), to deal in the Software without restriction, including
- * without limitation the rights to use, copy, modify, merge, publish,
- * distribute, sublicense, and/or sell copies of the Software, and to
- * permit persons to whom the Software is furnished to do so, subject to
- * the following conditions:
- *
- * The above copyright notice and this permission notice shall be included
- * in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
- * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
- * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
- * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
- * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-
 #ifndef PORTMACRO_H
 #define PORTMACRO_H