phy: rockchip: phy-rockchip-csi2-dphy: fix probe error handling

Fix incorrect error rewriting, so that -EPROBE_DEFER is correctly
handled. This fixes the following problem:

rockchip-csi2-dphy csi2-dphy0: failed to get mipi dcphy: -517
rockchip-csi2-dphy csi2-dphy0: probe with driver rockchip-csi2-dphy failed with error -22

Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>

drivers/phy/rockchip/phy-rockchip-csi2-dphy.c

@@ -1107,11 +1107,9 @@ static int rockchip_csi2_dphy_get_samsung_phy_hw(struct csi2_dphy *dphy)
 	for (i = 0; i < dphy->drv_data->num_samsung_phy; i++) {
 		sprintf(phy_name, "dcphy%d", i);
 		dcphy = devm_phy_optional_get(dev, phy_name);
-		if (IS_ERR(dcphy)) {
-			ret = PTR_ERR(dcphy);
-			dev_err(dphy->dev, "failed to get mipi dcphy: %d\n", ret);
-			return ret;
-		}
+		ret = PTR_ERR_OR_ZERO(dcphy);
+		if (ret)
+			return dev_err_probe(dphy->dev, ret, "failed to get mipi dcphy%d\n", i);
 		dcphy_hw = phy_get_drvdata(dcphy);
 		dphy->samsung_phy_group[i] = dcphy_hw;
 	}
@@ -1191,7 +1189,7 @@ static int rockchip_csi2_dphy_probe(struct platform_device *pdev)
 
 	ret = rockchip_csi2_dphy_get_hw(csi2dphy);
 	if (ret)
-		return -EINVAL;
+		return ret;
 	if (csi2dphy->drv_data->chip_id == CHIP_ID_RK3568 ||
 	    csi2dphy->drv_data->chip_id == CHIP_ID_RV1106) {
 		csi2dphy->csi_info.csi_num = 1;