drivers/video: fsl-diu-fb: the video buffer is not I/O memory

The video buffer is not uncached memory-mapped I/O, so don't tag the virtual
address as __iomem.  It's also not a u8*.
Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>

include/linux/fsl-diu-fb.h

@@ -162,7 +162,7 @@ struct diu_hw {
 };
 
 struct diu_addr {
-	__u8 __iomem *vaddr;	/* Virtual address */
+	void *vaddr;		/* Virtual address */
 	dma_addr_t paddr;	/* Physical address */
 	__u32 	   offset;
 };