ASoC: Fix resource leak if soc_register_ac97_dai_link failed

Properly free the resources in the case of soc_register_ac97_dai_link failure.
Signed-off-by: NAxel Lin <axel.lin@gmail.com>
Acked-by: NLiam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/soc-core.c

@@ -1622,6 +1622,8 @@ static void snd_soc_instantiate_card(struct snd_soc_card *card)
 		ret = soc_register_ac97_dai_link(&card->rtd[i]);
 		if (ret < 0) {
 			printk(KERN_ERR "asoc: failed to register AC97 %s\n", card->name);
+			while (--i >= 0)
+				soc_unregister_ac97_dai_link(&card->rtd[i]);
 			goto probe_dai_err;
 		}
 	}