ASoC: twl6040: fix error return code in twl6040_probe()

platform_get_irq() returns an error code, but the twl6040
driver ignores it and always returns -EINVAL. This is not correct,
and prevents -EPROBE_DEFER from being propagated properly.
Notice that platform_get_irq() no longer returns 0 on error.

Print and propagate the return value of platform_get_irq on failure.
Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/twl6040.c

@@ -1123,8 +1123,8 @@ static int twl6040_probe(struct snd_soc_codec *codec)
 
 	priv->plug_irq = platform_get_irq(pdev, 0);
 	if (priv->plug_irq < 0) {
-		dev_err(codec->dev, "invalid irq\n");
-		return -EINVAL;
+		dev_err(codec->dev, "invalid irq: %d\n", priv->plug_irq);
+		return priv->plug_irq;
 	}
 
 	INIT_DELAYED_WORK(&priv->hs_jack.work, twl6040_accessory_work);