Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/drivers/misc/ad525x_dpot.h b/drivers/misc/ad525x_dpot.h
index 443a51f..ee8dc9f 100644
--- a/drivers/misc/ad525x_dpot.h
+++ b/drivers/misc/ad525x_dpot.h
@@ -1,9 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  * Driver for the Analog Devices digital potentiometers
  *
  * Copyright (C) 2010 Michael Hennerich, Analog Devices Inc.
- *
- * Licensed under the GPL-2 or later.
  */
 
 #ifndef _AD_DPOT_H_