drm/sun4i: Move drm_mode_config_cleanup call to main driver

drm_mode_config_cleanup is the complement of drm_mode_config_init, which
is called in the bind function of sun4i_drv. drm_mode_config_cleanup
should be put in the unbind function to match.
Signed-off-by: NChen-Yu Tsai <wens@csie.org>
Signed-off-by: NMaxime Ripard <maxime.ripard@free-electrons.com>

drivers/gpu/drm/sun4i/sun4i_drv.c

@@ -160,6 +160,7 @@ static void sun4i_drv_unbind(struct device *dev)
 	drm_dev_unregister(drm);
 	drm_kms_helper_poll_fini(drm);
 	sun4i_framebuffer_free(drm);
+	drm_mode_config_cleanup(drm);
 	drm_vblank_cleanup(drm);
 	drm_dev_unref(drm);
 }

drivers/gpu/drm/sun4i/sun4i_framebuffer.c

@@ -48,5 +48,4 @@ void sun4i_framebuffer_free(struct drm_device *drm)
 	struct sun4i_drv *drv = drm->dev_private;
 
 	drm_fbdev_cma_fini(drv->fbdev);
-	drm_mode_config_cleanup(drm);
 }