Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/include/net/seg6.h b/include/net/seg6.h
index 2567941..640724b 100644
--- a/include/net/seg6.h
+++ b/include/net/seg6.h
@@ -1,14 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  *  SR-IPv6 implementation
  *
  *  Author:
  *  David Lebrun <david.lebrun@uclouvain.be>
- *
- *
- *  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.
  */
 
 #ifndef _NET_SEG6_H
@@ -16,7 +11,6 @@
 
 #include <linux/net.h>
 #include <linux/ipv6.h>
-#include <net/lwtunnel.h>
 #include <linux/seg6.h>
 #include <linux/rhashtable-types.h>