Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/include/net/ax88796.h b/include/net/ax88796.h
index 84b3785..aa52b2e 100644
--- a/include/net/ax88796.h
+++ b/include/net/ax88796.h
@@ -1,12 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /* include/net/ax88796.h
  *
  * Copyright 2005 Simtec Electronics
  *	Ben Dooks <ben@simtec.co.uk>
- *
- * 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.
- *
 */
 
 #ifndef __NET_AX88796_PLAT_H