drm/modes: Limit fallback modes to 60Hz

See also: http://bugzilla.redhat.com/514600

Signed-off-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index cea665d..dd95edf 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -1290,6 +1290,8 @@
 					ptr->vdisplay > vdisplay)
 				continue;
 		}
+		if (drm_mode_vrefresh(ptr) > 61)
+			continue;
 		mode = drm_mode_duplicate(dev, ptr);
 		if (mode) {
 			drm_mode_probed_add(connector, mode);