MX28: DMA: Align the struct mxs_dma_desc

Align this structure to DMA alignment size.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: Otavio Salvador <otavio@ossystems.com.br>
Cc: Stefano Babic <sbabic@denx.de>

arch/arm/include/asm/arch-mxs/dma.h

@@ -27,6 +27,7 @@
 #define __DMA_H__
 
 #include <linux/list.h>
+#include <linux/compiler.h>
 
 #ifndef	CONFIG_ARCH_DMA_PIO_WORDS
 #define	DMA_PIO_WORDS		15
@@ -109,7 +110,7 @@ struct mxs_dma_desc {
 	dma_addr_t		address;
 	void			*buffer;
 	struct list_head	node;
-};
+} __aligned(MXS_DMA_ALIGNMENT);
 
 /**
  * MXS DMA channel