Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/include/linux/cpu_rmap.h b/include/linux/cpu_rmap.h
index bdd18ca..02edeaf 100644
--- a/include/linux/cpu_rmap.h
+++ b/include/linux/cpu_rmap.h
@@ -1,13 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 #ifndef __LINUX_CPU_RMAP_H
 #define __LINUX_CPU_RMAP_H
 
 /*
  * cpu_rmap.c: CPU affinity reverse-map support
  * Copyright 2011 Solarflare Communications Inc.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published
- * by the Free Software Foundation, incorporated herein by reference.
  */
 
 #include <linux/cpumask.h>