Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/arch/arm/include/debug/msm.S b/arch/arm/include/debug/msm.S
index b03024f..9405b71 100644
--- a/arch/arm/include/debug/msm.S
+++ b/arch/arm/include/debug/msm.S
@@ -1,18 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  *
  * Copyright (C) 2007 Google, Inc.
  * Copyright (c) 2011, Code Aurora Forum. All rights reserved.
  * Author: Brian Swetland <swetland@google.com>
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
  */
 
 	.macro	addruart, rp, rv, tmp