Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/include/kvm/iodev.h b/include/kvm/iodev.h
index a6d208b..d75fc43 100644
--- a/include/kvm/iodev.h
+++ b/include/kvm/iodev.h
@@ -1,16 +1,4 @@
-/*
- * 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.
- *
- * 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, see <http://www.gnu.org/licenses/>.
- */
+/* SPDX-License-Identifier: GPL-2.0-only */
 
 #ifndef __KVM_IODEV_H__
 #define __KVM_IODEV_H__