Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/arch/arm/kernel/head-inflate-data.c b/arch/arm/kernel/head-inflate-data.c
index 6dd0ce5..89a5210 100644
--- a/arch/arm/kernel/head-inflate-data.c
+++ b/arch/arm/kernel/head-inflate-data.c
@@ -1,12 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * XIP kernel .data segment decompressor
  *
  * Created by:	Nicolas Pitre, August 2017
  * Copyright:	(C) 2017  Linaro Limited
- *
- * 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/init.h>