gma500: use the register map to clean up

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/gma500/oaktrail_device.c b/drivers/gpu/drm/gma500/oaktrail_device.c
index 3c3c862..a8eb801 100644
--- a/drivers/gpu/drm/gma500/oaktrail_device.c
+++ b/drivers/gpu/drm/gma500/oaktrail_device.c
@@ -475,7 +475,7 @@
 		.size = DSPASIZE,
 		.pos = DSPAPOS,
 		.surf = DSPASURF,
-		.addr = DSPABASE,
+		.addr = MRST_DSPABASE,
 		.status = PIPEASTAT,
 		.linoff = DSPALINOFF,
 		.tileoff = DSPATILEOFF,