spi-gpio: Use PTR_ERR_OR_ZERO() in spi_gpio_request()

Simplify this function implementation by using a known function.

Generated by: scripts/coccinelle/api/ptr_ret.cocci
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/b2dd074a-1693-3aea-42b4-da1f5ec155c4@web.deSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-gpio.c

@@ -290,10 +290,7 @@ static int spi_gpio_request(struct device *dev, struct spi_gpio *spi_gpio)
 		return PTR_ERR(spi_gpio->miso);
 
 	spi_gpio->sck = devm_gpiod_get(dev, "sck", GPIOD_OUT_LOW);
-	if (IS_ERR(spi_gpio->sck))
-		return PTR_ERR(spi_gpio->sck);
-
-	return 0;
+	return PTR_ERR_OR_ZERO(spi_gpio->sck);
 }
 
 #ifdef CONFIG_OF