Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/drivers/input/misc/wistron_btns.c b/drivers/input/misc/wistron_btns.c
index 43e67f5..7ce6cc6 100644
--- a/drivers/input/misc/wistron_btns.c
+++ b/drivers/input/misc/wistron_btns.c
@@ -1,21 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Wistron laptop button driver
  * Copyright (C) 2005 Miloslav Trmac <mitr@volny.cz>
  * Copyright (C) 2005 Bernhard Rosenkraenzer <bero@arklinux.org>
  * Copyright (C) 2005 Dmitry Torokhov <dtor@mail.ru>
- *
- * You can redistribute and/or modify this program under the terms of the
- * GNU General Public License version 2 as published by the Free Software
- * Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General
- * Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 59 Temple Place Suite 330, Boston, MA 02111-1307, USA.
  */
 #include <linux/io.h>
 #include <linux/dmi.h>