drm: add register and unregister functions for connectors

Introduce generic functions to register and unregister connectors. This
provides a common place to add and remove associated user space
interfaces.

Signed-off-by: Thomas Wood <thomas.wood@intel.com>
Reviewed-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/nouveau/nouveau_connector.c b/drivers/gpu/drm/nouveau/nouveau_connector.c
index 1fa222e..680f46d 100644
--- a/drivers/gpu/drm/nouveau/nouveau_connector.c
+++ b/drivers/gpu/drm/nouveau/nouveau_connector.c
@@ -104,7 +104,7 @@
 	struct nouveau_connector *nv_connector = nouveau_connector(connector);
 	nouveau_event_ref(NULL, &nv_connector->hpd);
 	kfree(nv_connector->edid);
-	drm_sysfs_connector_remove(connector);
+	drm_connector_unregister(connector);
 	drm_connector_cleanup(connector);
 	if (nv_connector->aux.transfer)
 		drm_dp_aux_unregister(&nv_connector->aux);
@@ -1236,6 +1236,6 @@
 
 	INIT_WORK(&nv_connector->work, nouveau_connector_hotplug_work);
 
-	drm_sysfs_connector_add(connector);
+	drm_connector_register(connector);
 	return connector;
 }