Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/fs/omfs/file.c b/fs/omfs/file.c
index bf83e66..d640b93 100644
--- a/fs/omfs/file.c
+++ b/fs/omfs/file.c
@@ -1,7 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * OMFS (as used by RIO Karma) file operations.
  * Copyright (C) 2005 Bob Copeland <me@bobcopeland.com>
- * Released under GPL v2.
  */
 
 #include <linux/module.h>