Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/drivers/dma/altera-msgdma.c b/drivers/dma/altera-msgdma.c
index 55f9c62..832aefb 100644
--- a/drivers/dma/altera-msgdma.c
+++ b/drivers/dma/altera-msgdma.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * DMA driver for Altera mSGDMA IP core
  *
@@ -5,11 +6,6 @@
  *
  * Based on drivers/dma/xilinx/zynqmp_dma.c, which is:
  * Copyright (C) 2016 Xilinx, Inc. All rights reserved.
- *
- * 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/bitops.h>