media: mtk-mdp: handle vpu_wdt_reg_handler() errors during probe

This is a cleanup to better handle errors during MDP probe.
Signed-off-by: Eizan Miyamoto <eizan@chromium.org>
Reviewed-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/media/platform/mtk-mdp/mtk_mdp_core.c

@@ -188,8 +188,12 @@ static int mtk_mdp_probe(struct platform_device *pdev)
 	}
 
 	mdp->vpu_dev = vpu_get_plat_device(pdev);
-	vpu_wdt_reg_handler(mdp->vpu_dev, mtk_mdp_reset_handler, mdp,
+	ret = vpu_wdt_reg_handler(mdp->vpu_dev, mtk_mdp_reset_handler, mdp,
 				  VPU_RST_MDP);
+	if (ret) {
+		dev_err(&pdev->dev, "Failed to register reset handler\n");
+		goto err_m2m_register;
+	}
 
 	platform_set_drvdata(pdev, mdp);