drm/i915/display: Remove drm_fb_helper_{add,remove}_one_connector calls

drm_fb_helper_{add,remove}_one_connector() are dummy functions now
and serve no purpose. Hence remove their calls.

This is the preparatory step for removing the
drm_fb_helper_{add,remove}_one_connector() functions from
drm_fb_helper.h

Signed-off-by: Pankaj Bharadiya <[e-mail]>
Reviewed-by: Emil Velikov <[e-mail]>
Reviewed-by: Alex Deucher <[e-mail]>
Signed-off-by: Daniel Vetter <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]

drivers/gpu/drm/i915/display/intel_dp_mst.c

···
 
 static void intel_dp_register_mst_connector(struct drm_connector *connector)
 {
-	struct drm_i915_private *dev_priv = to_i915(connector->dev);
-
-	if (dev_priv->fbdev)
-		drm_fb_helper_add_one_connector(&dev_priv->fbdev->helper,
-						connector);
-
 	drm_connector_register(connector);
 }
 
 static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
 					   struct drm_connector *connector)
 {
-	struct drm_i915_private *dev_priv = to_i915(connector->dev);
-
 	DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", connector->base.id, connector->name);
 	drm_connector_unregister(connector);
-
-	if (dev_priv->fbdev)
-		drm_fb_helper_remove_one_connector(&dev_priv->fbdev->helper,
-						   connector);
 
 	drm_connector_put(connector);
 }