Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/arch/arm/include/debug/asm9260.S b/arch/arm/include/debug/asm9260.S
index 292f85b..0da1eb6 100644
--- a/arch/arm/include/debug/asm9260.S
+++ b/arch/arm/include/debug/asm9260.S
@@ -1,13 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /* Debugging macro include header
  *
  *  Copyright (C) 1994-1999 Russell King
  *  Moved from linux/arch/arm/kernel/debug.S by Ben Dooks
  *  Modified for ASM9260 by Oleksij Remepl <linux@rempel-privat.de>
- *
- * 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.
- *
  */
 
 		.macro	addruart, rp, rv, tmp