[PATCH] dmaengine: xilinx_dpdma: use correct SDPX tag for header file

[Vinod Koul <vkoul@xxxxxxxxxx>]

Commit 188c310bdd5d ("dmaengine: xilinx_dpdma: stop using slave_id
field") add the header file with incorrect format for SPDX tag, fix that

WARNING: Improper SPDX comment style for 'include/linux/dma/xilinx_dpdma.h', please use '/*' instead
#1: FILE: include/linux/dma/xilinx_dpdma.h:1:
+// SPDX-License-Identifier: GPL-2.0

WARNING: Missing or malformed SPDX-License-Identifier tag in line 1
#1: FILE: include/linux/dma/xilinx_dpdma.h:1:
+// SPDX-License-Identifier: GPL-2.0

Fixes: 188c310bdd5d ("dmaengine: xilinx_dpdma: stop using slave_id field")
Signed-off-by: Vinod Koul <vkoul@xxxxxxxxxx>
---
 include/linux/dma/xilinx_dpdma.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/dma/xilinx_dpdma.h b/include/linux/dma/xilinx_dpdma.h
index 83a1377f03f8..02a4adf8921b 100644
--- a/include/linux/dma/xilinx_dpdma.h
+++ b/include/linux/dma/xilinx_dpdma.h
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: GPL-2.0
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __LINUX_DMA_XILINX_DPDMA_H
 #define __LINUX_DMA_XILINX_DPDMA_H
 
-- 
2.31.1