Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/sound/aoa/codecs/tas.c b/sound/aoa/codecs/tas.c
index 15c0575..7af6129 100644
--- a/sound/aoa/codecs/tas.c
+++ b/sound/aoa/codecs/tas.c
@@ -1,10 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Apple Onboard Audio driver for tas codec
  *
  * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
  *
- * GPL v2, can be found in COPYING.
- *
  * Open questions:
  *  - How to distinguish between 3004 and versions?
  *