backlight: lm3630a_bl: Simplify probe return on gpio request error

Code can be simpler: return directly when devm_gpiod_get_optional()
failed.

Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20240305-backlight-probe-v2-6-609b0cf24bde@linaro.org
Signed-off-by: Lee Jones <lee@kernel.org>

Author: krzk

drivers/video/backlight/lm3630a_bl.c

@@ -540,10 +540,8 @@ static int lm3630a_probe(struct i2c_client *client)
 
 	pchip->enable_gpio = devm_gpiod_get_optional(&client->dev, "enable",
 						GPIOD_OUT_HIGH);
-	if (IS_ERR(pchip->enable_gpio)) {
-		rval = PTR_ERR(pchip->enable_gpio);
-		return rval;
-	}
+	if (IS_ERR(pchip->enable_gpio))
+		return PTR_ERR(pchip->enable_gpio);
 
 	/* chip initialize */
 	rval = lm3630a_chip_init(pchip);