drm/tilcdc: Fix build breakage

Commit 34ea3d386347 ("drm: add register and unregister functions
for connectors") probably missed out converting the
drm_sysfs_connector_remove instances in the following files.
Without this patch we get the following compilation error:
ERROR: "drm_sysfs_connector_remove" [drivers/gpu/drm/tilcdc/tilcdc.ko] undefined!

Signed-off-by: Sachin Kamat <[e-mail]>
CC: Thomas Wood <[e-mail]>
CC: David Herrmann <[e-mail]>
CC: Daniel Vetter <[e-mail]>
Signed-off-by: Dave Airlie <[e-mail]>

drivers/gpu/drm/tilcdc/tilcdc_panel.c

···
 static void panel_connector_destroy(struct drm_connector *connector)
 {
 	struct panel_connector *panel_connector = to_panel_connector(connector);
-	drm_sysfs_connector_remove(connector);
+	drm_connector_unregister(connector);
 	drm_connector_cleanup(connector);
 	kfree(panel_connector);
 }

drivers/gpu/drm/tilcdc/tilcdc_slave.c

···
 static void slave_connector_destroy(struct drm_connector *connector)
 {
 	struct slave_connector *slave_connector = to_slave_connector(connector);
-	drm_sysfs_connector_remove(connector);
+	drm_connector_unregister(connector);
 	drm_connector_cleanup(connector);
 	kfree(slave_connector);
 }

drivers/gpu/drm/tilcdc/tilcdc_tfp410.c

···
 static void tfp410_connector_destroy(struct drm_connector *connector)
 {
 	struct tfp410_connector *tfp410_connector = to_tfp410_connector(connector);
-	drm_sysfs_connector_remove(connector);
+	drm_connector_unregister(connector);
 	drm_connector_cleanup(connector);
 	kfree(tfp410_connector);
 }