Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/include/linux/regulator/db8500-prcmu.h b/include/linux/regulator/db8500-prcmu.h
index 6120623..f90df9e 100644
--- a/include/linux/regulator/db8500-prcmu.h
+++ b/include/linux/regulator/db8500-prcmu.h
@@ -1,8 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * Copyright (C) ST-Ericsson SA 2010
  *
- * License Terms: GNU General Public License v2
- *
  * Author: Bengt Jonsson <bengt.g.jonsson@stericsson.com> for ST-Ericsson
  *
  * Interface to power domain regulators on DB8500