ASoC: amd: fix for variable set but not used warning

Fix below kernel warning.
>>> sound/soc/amd/acp-es8336.c:200:13: warning: variable 'ret' set but
>>> not used [-Wunused-but-set-variable]
Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@amd.com>
Reported-by: kernel test robot <lkp@intel.com>
Link: https://lore.kernel.org/r/20220707132613.3150931-3-Vijendar.Mukunda@amd.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/amd/acp-es8336.c

@@ -206,6 +206,8 @@ static int st_es8336_late_probe(struct snd_soc_card *card)
 		dev_err(card->dev, "can not find codec dev\n");
 
 	ret = devm_acpi_dev_add_driver_gpios(codec_dev, acpi_es8336_gpios);
+	if (ret)
+		dev_warn(card->dev, "Failed to add driver gpios\n");
 
 	gpio_pa = gpiod_get_optional(codec_dev, "pa-enable", GPIOD_OUT_LOW);
 	if (IS_ERR(gpio_pa)) {
@@ -213,6 +215,7 @@ static int st_es8336_late_probe(struct snd_soc_card *card)
 				    "could not get pa-enable GPIO\n");
 		gpiod_put(gpio_pa);
 		put_device(codec_dev);
+		return ret;
 	}
 	return 0;
 }