dmaengine: sh: convert to SPDX identifiers

This patch updates license to use SPDX-License-Identifier
instead of verbose license text.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>

drivers/dma/sh/Kconfig

+# SPDX-License-Identifier: GPL-2.0
 #
 # DMA engine configuration for sh
 #

include/linux/shdma-base.h

-/*
+/* SPDX-License-Identifier: GPL-2.0
+ *
  * Dmaengine driver base library for DMA controllers, found on SH-based SoCs
  *
  * extracted from shdma.c and headers
@@ -7,10 +8,6 @@
  * Copyright (C) 2009 Nobuhiro Iwamatsu <iwamatsu.nobuhiro@renesas.com>
  * Copyright (C) 2009 Renesas Solutions, Inc. All rights reserved.
  * Copyright (C) 2007 Freescale Semiconductor, Inc. All rights reserved.
- *
- * This is free software; you can redistribute it and/or modify
- * it under the terms of version 2 of the GNU General Public License as
- * published by the Free Software Foundation.
  */
 
 #ifndef SHDMA_BASE_H