ASoC: Factor out snd_soc_init_card()

snd_soc_init_card() is always called as the last part of the CODEC probe
function so we can factor it out into the core card setup rather than
have each CODEC replicate the code to do the initialiastation. This will
be required to support multiple CODECs per card.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/codecs/ad1938.c

@@ -596,12 +596,6 @@ static int ad1938_probe(struct platform_device *pdev)
 
 	ad1938_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 
-	ret = snd_soc_init_card(socdev);
-	if (ret < 0) {
-		dev_err(codec->dev, "failed to register card: %d\n", ret);
-		goto card_err;
-	}
-
 	return ret;
 
 card_err: