ALSA: hda: cirrus_scodec: fix an error code

The "ret" variable is zero but we should return -EINVAL.

Fixes: 2144833e ("ALSA: hda: cirrus_scodec: Add KUnit test")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Link: https://lore.kernel.org/r/5eea7fd5-67c8-4ed4-b5b3-b85dfb7572cc@moroto.mountainSigned-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/hda/cirrus_scodec_test.c

@@ -137,8 +137,8 @@ static int cirrus_scodec_test_create_gpio(struct kunit *test)
 	priv->gpio_priv = dev_get_drvdata(&priv->gpio_pdev->dev);
 	if (!priv->gpio_priv) {
 		platform_device_put(priv->gpio_pdev);
-		KUNIT_FAIL(test, "Failed to get gpio private data: %d\n", ret);
-		return ret;
+		KUNIT_FAIL(test, "Failed to get gpio private data\n");
+		return -EINVAL;
 	}
 
 	return 0;