Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/arch/x86/include/asm/ist.h b/arch/x86/include/asm/ist.h
index c9803f1..7ede273 100644
--- a/arch/x86/include/asm/ist.h
+++ b/arch/x86/include/asm/ist.h
@@ -1,16 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  * Include file for the interface to IST BIOS
  * Copyright 2002 Andy Grover <andrew.grover@intel.com>
- *
- * 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, or (at your option) any
- * later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
  */
 #ifndef _ASM_X86_IST_H
 #define _ASM_X86_IST_H