Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/include/linux/libps2.h b/include/linux/libps2.h
index 5f18fe0..53f7e4d 100644
--- a/include/linux/libps2.h
+++ b/include/linux/libps2.h
@@ -1,13 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 #ifndef _LIBPS2_H
 #define _LIBPS2_H
 
 /*
  * Copyright (C) 1999-2002 Vojtech Pavlik
  * Copyright (C) 2004 Dmitry Torokhov
- *
- * 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/bitops.h>