Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/include/sound/wavefront.h b/include/sound/wavefront.h
index 15d82e5..37ed437 100644
--- a/include/sound/wavefront.h
+++ b/include/sound/wavefront.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 #ifndef __SOUND_WAVEFRONT_H__
 #define __SOUND_WAVEFRONT_H__
 
@@ -5,20 +6,6 @@
  *  Driver for Turtle Beach Wavefront cards (Maui,Tropez,Tropez+)
  *
  *  Copyright (c) by Paul Barton-Davis <pbd@op.net>
- *
- *   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
  */
 
 #if (!defined(__GNUC__) && !defined(__GNUG__))