phy: renesas: rcar-gen3-usb2: disable runtime pm in case of failure

pm_runtime_enable() will decrease power disable depth. Thus a pairing
increment is needed on the error handling path to keep it balanced.

Fixes: 5d8042e9 ("phy: rcar-gen3-usb2: Add support for r8a77470")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Wang Li <wangli74@huawei.com>
Link: https://lore.kernel.org/r/20201126024412.4046845-1-wangli74@huawei.comSigned-off-by: Vinod Koul <vkoul@kernel.org>

drivers/phy/renesas/phy-rcar-gen3-usb2.c

@@ -654,8 +654,10 @@ static int rcar_gen3_phy_usb2_probe(struct platform_device *pdev)
 	 */
 	pm_runtime_enable(dev);
 	phy_usb2_ops = of_device_get_match_data(dev);
-	if (!phy_usb2_ops)
-		return -EINVAL;
+	if (!phy_usb2_ops) {
+		ret = -EINVAL;
+		goto error;
+	}
 
 	mutex_init(&channel->lock);
 	for (i = 0; i < NUM_OF_PHYS; i++) {