Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/drivers/cpufreq/elanfreq.c b/drivers/cpufreq/elanfreq.c
index 03419f0..2242541 100644
--- a/drivers/cpufreq/elanfreq.c
+++ b/drivers/cpufreq/elanfreq.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *	elanfreq:	cpufreq driver for the AMD ELAN family
  *
@@ -7,13 +8,7 @@
  *
  *      All Rights Reserved.
  *
- *	This program is free software; you can redistribute it and/or
- *	modify it under the terms of the GNU General Public License
- *	as published by the Free Software Foundation; either version
- *	2 of the License, or (at your option) any later version.
- *
  *	2002-02-13: - initial revision for 2.4.18-pre9 by Robert Schwebel
- *
  */
 
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt