Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/drivers/media/dvb-frontends/s921.c b/drivers/media/dvb-frontends/s921.c
index 7927687..f118d8e 100644
--- a/drivers/media/dvb-frontends/s921.c
+++ b/drivers/media/dvb-frontends/s921.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *   Sharp VA3A5JZ921 One Seg Broadcast Module driver
  *   This device is labeled as just S. 921 at the top of the frontend can
@@ -11,15 +12,6 @@
  *	the old s921 driver.
  *
  *   FIXME: Need to port to DVB v5.2 API
- *
- *   This program is free software; you can redistribute it and/or
- *   modify it under the terms of the GNU General Public License as
- *   published by the Free Software Foundation version 2.
- *
- *   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.
  */
 
 #include <linux/kernel.h>