Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/drivers/input/input-mt.c b/drivers/input/input-mt.c
index 6c7326c..a81e141 100644
--- a/drivers/input/input-mt.c
+++ b/drivers/input/input-mt.c
@@ -1,11 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Input Multitouch Library
  *
  * Copyright (c) 2008-2010 Henrik Rydberg
- *
- * 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/input/mt.h>