drm/gma500: Add chip specific sdvo masks

Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
diff --git a/drivers/gpu/drm/gma500/psb_device.c b/drivers/gpu/drm/gma500/psb_device.c
index 6976786..23fb33f 100644
--- a/drivers/gpu/drm/gma500/psb_device.c
+++ b/drivers/gpu/drm/gma500/psb_device.c
@@ -373,6 +373,7 @@
 	.crtcs = 2,
 	.hdmi_mask = (1 << 0),
 	.lvds_mask = (1 << 1),
+	.sdvo_mask = (1 << 0),
 	.cursor_needs_phys = 1,
 	.sgx_offset = PSB_SGX_OFFSET,
 	.chip_setup = psb_chip_setup,