Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/arch/powerpc/sysdev/fsl_rmu.c b/arch/powerpc/sysdev/fsl_rmu.c
index 88b35a3..7a5e2e2 100644
--- a/arch/powerpc/sysdev/fsl_rmu.c
+++ b/arch/powerpc/sysdev/fsl_rmu.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Freescale MPC85xx/MPC86xx RapidIO RMU support
  *
@@ -17,11 +18,6 @@
  *
  * Copyright 2005 MontaVista Software, Inc.
  * Matt Porter <mporter@kernel.crashing.org>
- *
- * 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/types.h>
@@ -757,14 +753,13 @@
 
 	/* Initialize outbound message descriptor ring */
 	rmu->msg_tx_ring.virt = dma_alloc_coherent(priv->dev,
-				rmu->msg_tx_ring.size * RIO_MSG_DESC_SIZE,
-				&rmu->msg_tx_ring.phys, GFP_KERNEL);
+						   rmu->msg_tx_ring.size * RIO_MSG_DESC_SIZE,
+						   &rmu->msg_tx_ring.phys,
+						   GFP_KERNEL);
 	if (!rmu->msg_tx_ring.virt) {
 		rc = -ENOMEM;
 		goto out_dma;
 	}
-	memset(rmu->msg_tx_ring.virt, 0,
-			rmu->msg_tx_ring.size * RIO_MSG_DESC_SIZE);
 	rmu->msg_tx_ring.tx_slot = 0;
 
 	/* Point dequeue/enqueue pointers at first entry in ring */