ASoC: remove .get_regmap

To setup regmap, ALSA SoC has snd_soc_component_init_regmap() and
.get_regmap. But these are duplicated feature.
Now, no one is using .get_regmap, let's remove it.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Reviewed-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

include/sound/soc.h

@@ -947,8 +947,6 @@ struct snd_soc_codec_driver {
 	int (*set_jack)(struct snd_soc_codec *codec,
 			struct snd_soc_jack *jack,  void *data);
 
-	/* codec IO */
-	struct regmap *(*get_regmap)(struct device *);
 	unsigned int (*read)(struct snd_soc_codec *, unsigned int);
 	int (*write)(struct snd_soc_codec *, unsigned int, unsigned int);
 

sound/soc/soc-core.c

@@ -3392,9 +3392,6 @@ int snd_soc_register_codec(struct device *dev,
 	codec->component.debugfs_prefix = "codec";
 #endif
 
-	if (codec_drv->get_regmap)
-		codec->component.regmap = codec_drv->get_regmap(dev);
-
 	for (i = 0; i < num_dai; i++) {
 		convert_endianness_formats(&dai_drv[i].playback);
 		convert_endianness_formats(&dai_drv[i].capture);