Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/arch/arm/probes/decode.c b/arch/arm/probes/decode.c
index 880ebe0..fe81a9c 100644
--- a/arch/arm/probes/decode.c
+++ b/arch/arm/probes/decode.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * arch/arm/probes/decode.c
  *
@@ -5,10 +6,6 @@
  *
  * Some contents moved here from arch/arm/include/asm/kprobes-arm.c which is
  * Copyright (C) 2006, 2007 Motorola Inc.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
  */
 
 #include <linux/kernel.h>