drm/bochs: add missing drm_atomic_helper_shutdown() call.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20190401140306.28063-3-kraxel@redhat.com

drivers/gpu/drm/bochs/bochs_kms.c

@@ -293,6 +293,7 @@ int bochs_kms_init(struct bochs_device *bochs)
 void bochs_kms_fini(struct bochs_device *bochs)
 {
 	if (bochs->mode_config_initialized) {
+		drm_atomic_helper_shutdown(bochs->dev);
 		drm_mode_config_cleanup(bochs->dev);
 		bochs->mode_config_initialized = false;
 	}