Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/security/keys/dh.c b/security/keys/dh.c
index 711e89d..c4c629b 100644
--- a/security/keys/dh.c
+++ b/security/keys/dh.c
@@ -1,11 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* Crypto operations using stored keys
  *
  * Copyright (c) 2016, Intel Corporation
- *
- * 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.
  */
 
 #include <linux/slab.h>
@@ -112,7 +108,6 @@
 	if (!sdesc)
 		goto out_free_tfm;
 	sdesc->shash.tfm = tfm;
-	sdesc->shash.flags = 0x0;
 
 	*sdesc_ret = sdesc;