drm/mediatek: Convert drm_atomic_helper_suspend/resume()

{

	struct mtk_drm_private *private = dev_get_drvdata(dev);

	struct drm_device *drm = private->drm;

	int ret;

	drm_kms_helper_poll_disable(drm);

	private->suspend_state = drm_atomic_helper_suspend(drm);

	if (IS_ERR(private->suspend_state)) {

		drm_kms_helper_poll_enable(drm);

		return PTR_ERR(private->suspend_state);

	}

	ret = drm_mode_config_helper_suspend(drm);

	DRM_DEBUG_DRIVER("mtk_drm_sys_suspend\n");

	return 0;

	return ret;

}

static int mtk_drm_sys_resume(struct device *dev)

{

	struct mtk_drm_private *private = dev_get_drvdata(dev);

	struct drm_device *drm = private->drm;

	int ret;

	drm_atomic_helper_resume(drm, private->suspend_state);

	drm_kms_helper_poll_enable(drm);

	ret = drm_mode_config_helper_resume(drm);

	DRM_DEBUG_DRIVER("mtk_drm_sys_resume\n");

	return 0;

	return ret;

}

#endif