ASoC: Remove unused "control_data" field of struct wm9081_priv

The control_data field is used to initialize the codec's control_data field,
but since this is also done by the snd-soc-cache core, the redundant
assignment can be removed and the field can be dropped.
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/codecs/wm9081.c

@@ -157,7 +157,6 @@ static struct {
 
 struct wm9081_priv {
 	enum snd_soc_control_type control_type;
-	void *control_data;
 	int sysclk_source;
 	int mclk_rate;
 	int sysclk_rate;
@@ -1213,7 +1212,6 @@ static int wm9081_probe(struct snd_soc_codec *codec)
 	int ret;
 	u16 reg;
 
-	codec->control_data = wm9081->control_data;
 	ret = snd_soc_codec_set_cache_io(codec, 8, 16, wm9081->control_type);
 	if (ret != 0) {
 		dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
@@ -1330,7 +1328,6 @@ static __devinit int wm9081_i2c_probe(struct i2c_client *i2c,
 
 	i2c_set_clientdata(i2c, wm9081);
 	wm9081->control_type = SND_SOC_I2C;
-	wm9081->control_data = i2c;
 
 	if (dev_get_platdata(&i2c->dev))
 		memcpy(&wm9081->pdata, dev_get_platdata(&i2c->dev),