mmc: jz4740: Use PTR_ERR_OR_ZERO in jz4740_mmc_request_gpios()

Use PTR_ERR_OR_ZERO rather than if(IS_ERR(...)) + PTR_ERR
Signed-off-by: NYueHaibing <yuehaibing@huawei.com>
Acked-by: NJoey Pabalinas <joeypabalinas@gmail.com>
Reviewed-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

drivers/mmc/host/jz4740_mmc.c

@@ -965,10 +965,7 @@ static int jz4740_mmc_request_gpios(struct jz4740_mmc_host *host,
 
 	host->power = devm_gpiod_get_optional(&pdev->dev, "power",
 					      GPIOD_OUT_HIGH);
-	if (IS_ERR(host->power))
-		return PTR_ERR(host->power);
-
-	return 0;
+	return PTR_ERR_OR_ZERO(host->power);
 }
 
 static const struct of_device_id jz4740_mmc_of_match[] = {