ASoC:: remove a redundant snd_soc_unregister_codec call in wm8988_register

snd_soc_unregister_codec is called twice if snd_soc_register_dai fail.

Signed-off-by: Axel Lin <[e-mail]>
Acked-by: Liam Girdwood <[e-mail]>
Signed-off-by: Mark Brown <[e-mail]>

sound/soc/codecs/wm8988.c

···
 	ret = snd_soc_register_dai(&wm8988_dai);
 	if (ret != 0) {
 		dev_err(codec->dev, "Failed to register DAI: %d\n", ret);
-		snd_soc_unregister_codec(codec);
 		goto err_codec;
 	}