drm crtc: use drm_mode_destroy instead of kfree in drm_mode_remove

Modes are created using drm_mode_create which does a
drm_mode_object_get, so use drm_mode_destroy in drm_mode_remove
which does a drm_mode_object_put.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index c1a0d34..33ebe29 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -442,7 +442,7 @@
 		     struct drm_display_mode *mode)
 {
 	list_del(&mode->head);
-	kfree(mode);
+	drm_mode_destroy(connector->dev, mode);
 }
 EXPORT_SYMBOL(drm_mode_remove);