Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/sound/soc/codecs/adav801.c b/sound/soc/codecs/adav801.c
index d82f79d..f734c71 100644
--- a/sound/soc/codecs/adav801.c
+++ b/sound/soc/codecs/adav801.c
@@ -1,9 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * ADAV801 audio driver
  *
  * Copyright 2014 Analog Devices Inc.
- *
- * Licensed under the GPL-2.
  */
 
 #include <linux/module.h>