Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/include/linux/enclosure.h b/include/linux/enclosure.h
index a4cf57c..564e96f 100644
--- a/include/linux/enclosure.h
+++ b/include/linux/enclosure.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * Enclosure Services
  *
@@ -5,18 +6,6 @@
  *
 **-----------------------------------------------------------------------------
 **
-**  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.
-**
-**  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., 675 Mass Ave, Cambridge, MA 02139, USA.
 **
 **-----------------------------------------------------------------------------
 */