Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/include/clocksource/pxa.h b/include/clocksource/pxa.h
index a9a0f03..0cfe7b9 100644
--- a/include/clocksource/pxa.h
+++ b/include/clocksource/pxa.h
@@ -1,12 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * PXA clocksource, clockevents, and OST interrupt handlers.
  *
  * Copyright (C) 2014 Robert Jarzmik
- *
- * 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; version 2 of the License.
- *
  */
 
 #ifndef _CLOCKSOURCE_PXA_H