drm/hisilicon: Make kirin_drm_unbind sufficient

Remove deprecated drm_put_dev.
Clean up everything needed in unbind.
Thanks to Daniel Vetter, this issue is reported by him.
Acked-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Reported-by: NDaniel Vetter <daniel.vetter@intel.com>
Signed-off-by: NXinliang Liu <xinliang.liu@linaro.org>

drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.c

@@ -244,7 +244,12 @@ static int kirin_drm_bind(struct device *dev)
 
 static void kirin_drm_unbind(struct device *dev)
 {
-	drm_put_dev(dev_get_drvdata(dev));
+	struct drm_device *drm_dev = dev_get_drvdata(dev);
+
+	drm_connector_unregister_all(drm_dev);
+	drm_dev_unregister(drm_dev);
+	kirin_drm_kms_cleanup(drm_dev);
+	drm_dev_unref(drm_dev);
 }
 
 static const struct component_master_ops kirin_drm_ops = {