Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/sound/soc/codecs/uda134x.c b/sound/soc/codecs/uda134x.c
index 3c935a9..1cc7f56 100644
--- a/sound/soc/codecs/uda134x.c
+++ b/sound/soc/codecs/uda134x.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * uda134x.c  --  UDA134X ALSA SoC Codec driver
  *
@@ -7,10 +8,6 @@
  * Author: Zoltan Devai
  *
  * Based on the WM87xx drivers by Liam Girdwood and Richard Purdie
- *
- * 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/module.h>