Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/include/linux/vringh.h b/include/linux/vringh.h
index bc6c28d..d237087 100644
--- a/include/linux/vringh.h
+++ b/include/linux/vringh.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  * Linux host-side vring helpers; for when the kernel needs to access
  * someone else's vring.
@@ -5,20 +6,6 @@
  * Copyright IBM Corporation, 2013.
  * Parts taken from drivers/vhost/vhost.c Copyright 2009 Red Hat, Inc.
  *
- * 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.
- *
- * 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.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
  * Written by: Rusty Russell <rusty@rustcorp.com.au>
  */
 #ifndef _LINUX_VRINGH_H