V4L/DVB (5565): Cx88: fix compilation on alpha

error: 'DMA_32BIT_MASK' undeclared
Signed-off-by: NAlexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@infradead.org>

drivers/media/video/cx88/cx88-mpeg.c

@@ -28,6 +28,7 @@
 #include <linux/device.h>
 #include <linux/dma-mapping.h>
 #include <linux/interrupt.h>
+#include <linux/dma-mapping.h>
 #include <asm/delay.h>
 
 #include "cx88.h"

drivers/media/video/cx88/cx88-video.c

@@ -36,6 +36,7 @@
 #include <linux/dma-mapping.h>
 #include <linux/delay.h>
 #include <linux/kthread.h>
+#include <linux/dma-mapping.h>
 #include <asm/div64.h>
 
 #include "cx88.h"