drm/gma500: Add chip specific sdvo masks

Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
diff --git a/drivers/gpu/drm/gma500/framebuffer.c b/drivers/gpu/drm/gma500/framebuffer.c
index 01dd7d2..94b3fec 100644
--- a/drivers/gpu/drm/gma500/framebuffer.c
+++ b/drivers/gpu/drm/gma500/framebuffer.c
@@ -714,7 +714,7 @@
 			clone_mask = (1 << INTEL_OUTPUT_ANALOG);
 			break;
 		case INTEL_OUTPUT_SDVO:
-			crtc_mask = ((1 << 0) | (1 << 1));
+			crtc_mask = dev_priv->ops->sdvo_mask;
 			clone_mask = (1 << INTEL_OUTPUT_SDVO);
 			break;
 		case INTEL_OUTPUT_LVDS: