Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/arch/arm/mach-ux500/pm_domains.h b/arch/arm/mach-ux500/pm_domains.h
index 263d3ba..33c55f2 100644
--- a/arch/arm/mach-ux500/pm_domains.h
+++ b/arch/arm/mach-ux500/pm_domains.h
@@ -1,8 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * Copyright (C) 2014 Linaro Ltd.
  *
  * Author: Ulf Hansson <ulf.hansson@linaro.org>
- * License terms: GNU General Public License (GPL) version 2
  */
 
 #ifndef __MACH_UX500_PM_DOMAINS_H