Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/include/linux/regulator/ab8500.h b/include/linux/regulator/ab8500.h
index 6d46f96..7cf8f79 100644
--- a/include/linux/regulator/ab8500.h
+++ b/include/linux/regulator/ab8500.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
- *
  * Authors: Sundar Iyer <sundar.iyer@stericsson.com> for ST-Ericsson
  *          Bengt Jonsson <bengt.g.jonsson@stericsson.com> for ST-Ericsson
  *          Daniel Willerud <daniel.willerud@stericsson.com> for ST-Ericsson