dma: mv_xor: Cleanup in dma-mv_xor.h header

Commit c02cecb9 ("ARM: orion: move platform_data definitions")
moved the file to the current location but forgot to remove the pointer
to its previous location. Clean it up. While at it also change the header
file protection macros appropriately.
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

include/linux/platform_data/dma-mv_xor.h

 /*
- * arch/arm/plat-orion/include/plat/mv_xor.h
- *
  * Marvell XOR platform device data definition file.
  */
 
-#ifndef __PLAT_MV_XOR_H
-#define __PLAT_MV_XOR_H
+#ifndef __DMA_MV_XOR_H
+#define __DMA_MV_XOR_H
 
 #include <linux/dmaengine.h>
 #include <linux/mbus.h>