ASoC: codec: Simplify ASoC probe code.

For some CODEC drivers like who act as the MFDs children are ignored
by this patch.

Signed-off-by: Xiubo Li <Li.Xiubo@freescale.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
diff --git a/sound/soc/codecs/wm8996.c b/sound/soc/codecs/wm8996.c
index 1a7655b..5406643 100644
--- a/sound/soc/codecs/wm8996.c
+++ b/sound/soc/codecs/wm8996.c
@@ -2628,14 +2628,6 @@
 	init_completion(&wm8996->dcs_done);
 	init_completion(&wm8996->fll_lock);
 
-	codec->control_data = wm8996->regmap;
-
-	ret = snd_soc_codec_set_cache_io(codec, 16, 16, SND_SOC_REGMAP);
-	if (ret != 0) {
-		dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
-		goto err;
-	}
-
 	if (wm8996->pdata.num_retune_mobile_cfgs)
 		wm8996_retune_mobile_pdata(codec);
 	else
@@ -2674,13 +2666,11 @@
 		} else {
 			dev_err(codec->dev, "Failed to request IRQ: %d\n",
 				ret);
+			return ret;
 		}
 	}
 
 	return 0;
-
-err:
-	return ret;
 }
 
 static int wm8996_remove(struct snd_soc_codec *codec)