drm/i915: use VBT to determine whether to enumerate the VGA port

Some platforms may not have it, and enumerating it is both confusing and
time consuming due to the hotplug and DDC probing.
Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>
Reviewed-by: NBen Widawsky <ben@bwidawsk.net>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/intel_display.c

@@ -11106,7 +11106,7 @@ static void intel_setup_outputs(struct drm_device *dev)
 
 	intel_lvds_init(dev);
 
-	if (!IS_ULT(dev) && !IS_CHERRYVIEW(dev))
+	if (!IS_ULT(dev) && !IS_CHERRYVIEW(dev) && dev_priv->vbt.int_crt_support)
 		intel_crt_init(dev);
 
 	if (HAS_DDI(dev)) {