Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/arch/x86/boot/mkcpustr.c b/arch/x86/boot/mkcpustr.c
index f72498d..9caa10e 100644
--- a/arch/x86/boot/mkcpustr.c
+++ b/arch/x86/boot/mkcpustr.c
@@ -1,11 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* ----------------------------------------------------------------------- *
  *
  *   Copyright 2008 rPath, Inc. - All Rights Reserved
  *
- *   This file is part of the Linux kernel, and is made available under
- *   the terms of the GNU General Public License version 2 or (at your
- *   option) any later version; incorporated herein by reference.
- *
  * ----------------------------------------------------------------------- */
 
 /*