ASoC: io: Remove SND_SOC_I2C

Now that all users have been converted to regmap we can eliminate the ASoC
level wrapper for I2C I/O reducing the amount of duplicated functionality.

Signed-off-by: Mark Brown <broonie@linaro.org>

include/sound/soc.h

@@ -341,7 +341,6 @@ typedef int (*hw_write_t)(void *,const char* ,int);
 extern struct snd_ac97_bus_ops *soc_ac97_ops;
 
 enum snd_soc_control_type {
-	SND_SOC_I2C = 1,
 	SND_SOC_REGMAP,
 };
 

sound/soc/soc-io.c

@@ -99,13 +99,6 @@ int snd_soc_codec_set_cache_io(struct snd_soc_codec *codec,
 	config.val_bits = data_bits;
 
 	switch (control) {
-#if IS_ENABLED(CONFIG_REGMAP_I2C)
-	case SND_SOC_I2C:
-		codec->control_data = regmap_init_i2c(to_i2c_client(codec->dev),
-						      &config);
-		break;
-#endif
-
 	case SND_SOC_REGMAP:
 		/* Device has made its own regmap arrangements */
 		codec->using_regmap = true;