drm: bridge: analogix: Disable clock when unbinding

The clock is enabled when binding analogix dp.

Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com>
Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Link: http://patchwork.freedesktop.org/patch/msgid/1491481885-13775-4-git-send-email-jeffy.chen@rock-chips.com

drivers/gpu/drm/bridge/analogix/analogix_dp_core.c

@@ -1449,6 +1449,7 @@ void analogix_dp_unbind(struct device *dev, struct device *master,
 
 	drm_dp_aux_unregister(&dp->aux);
 	pm_runtime_disable(dev);
+	clk_disable_unprepare(dp->clock);
 }
 EXPORT_SYMBOL_GPL(analogix_dp_unbind);