ASoC: ab8500-codec: remove useless structure

ASoC: ab8500-codec: remove useless structure

Cppcheck warnings:

sound/soc/codecs/ab8500-codec.c:117:20: style: struct member 'ab8500_codec_drvdata_dbg::vaud' is never used. [unusedStructMember]
 struct regulator *vaud;
                   ^
sound/soc/codecs/ab8500-codec.c:118:20: style: struct member 'ab8500_codec_drvdata_dbg::vamic1' is never used. [unusedStructMember]
 struct regulator *vamic1;
                   ^
sound/soc/codecs/ab8500-codec.c:119:20: style: struct member 'ab8500_codec_drvdata_dbg::vamic2' is never used. [unusedStructMember]
 struct regulator *vamic2;
                   ^
sound/soc/codecs/ab8500-codec.c:120:20: style: struct member 'ab8500_codec_drvdata_dbg::vdmic' is never used. [unusedStructMember]
 struct regulator *vdmic;
                   ^

The structure is never used, remove.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20210312182246.5153-2-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>