ASoC: es8328: remove unused variable 'pga_tlv'

sound/soc/codecs/es8328.c:102:35: warning:
 pga_tlv defined but not used [-Wunused-const-variable=]

They are never used, so can be removed.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Link: https://lore.kernel.org/r/20190815092056.28724-1-yuehaibing@huawei.com


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