ASoC: codecs: jz4770: Remove defined but never used variable 'mic_boost_tlv'

Fixes the following W=1 kernel build warning(s):

 In file included from include/sound/tlv.h:10,
 from sound/soc/codecs/jz4770.c:19:
 sound/soc/codecs/jz4770.c:306:35: warning: ‘mic_boost_tlv’ defined but not used [-Wunused-const-variable=]
 306 | static const DECLARE_TLV_DB_SCALE(mic_boost_tlv, 0, 400, 0);
 | ^~~~~~~~~~~~~
 include/uapi/sound/tlv.h:64:15: note: in definition of macro ‘SNDRV_CTL_TLVD_DECLARE_DB_SCALE’
 64 | unsigned int name[] = { | ^~~~
 sound/soc/codecs/jz4770.c:306:14: note: in expansion of macro ‘DECLARE_TLV_DB_SCALE’
 306 | static const DECLARE_TLV_DB_SCALE(mic_boost_tlv, 0, 400, 0);
 | ^~~~~~~~~~~~~~~~~~~~
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Paul Cercueil <paul@crapouillou.net>
Cc: ter Huurne <maarten@treewalker.org>
Link: https://lore.kernel.org/r/20200707190612.97799-9-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/jz4770.c

@@ -303,7 +303,6 @@ static int jz4770_codec_digital_mute(struct snd_soc_dai *dai, int mute)
 static const DECLARE_TLV_DB_MINMAX_MUTE(dac_tlv, -3100, 0);
 static const DECLARE_TLV_DB_SCALE(adc_tlv, 0, 100, 0);
 static const DECLARE_TLV_DB_MINMAX(out_tlv, -2500, 600);
-static const DECLARE_TLV_DB_SCALE(mic_boost_tlv, 0, 400, 0);
 static const DECLARE_TLV_DB_SCALE(linein_tlv, -2500, 100, 0);
 
 /* Unconditional controls. */