Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/include/linux/i8042.h b/include/linux/i8042.h
index d98780c..0261e2f 100644
--- a/include/linux/i8042.h
+++ b/include/linux/i8042.h
@@ -1,11 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 #ifndef _LINUX_I8042_H
 #define _LINUX_I8042_H
 
-/*
- * 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/types.h>