drm/rockchip: vop: Unprepare clocks when unbinding

The clocks are prepared when binding vop.
Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Link: http://patchwork.freedesktop.org/patch/msgid/1491481885-13775-9-git-send-email-jeffy.chen@rock-chips.com

drivers/gpu/drm/rockchip/rockchip_drm_vop.c

@@ -1634,6 +1634,10 @@ static void vop_unbind(struct device *dev, struct device *master, void *data)
 
 	pm_runtime_disable(dev);
 	vop_destroy_crtc(vop);
+
+	clk_unprepare(vop->aclk);
+	clk_unprepare(vop->hclk);
+	clk_unprepare(vop->dclk);
 }
 
 const struct component_ops vop_component_ops = {