Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/drivers/hid/hid-elo.c b/drivers/hid/hid-elo.c
index 5eea6fe..0d22713 100644
--- a/drivers/hid/hid-elo.c
+++ b/drivers/hid/hid-elo.c
@@ -1,11 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * HID driver for ELO usb touchscreen 4000/4500
  *
  * Copyright (c) 2013 Jiri Slaby
  *
  * Data parsing taken from elousb driver by Vojtech Pavlik.
- *
- * This driver is licensed under the terms of GPLv2.
  */
 
 #include <linux/hid.h>