ASoC: codecs: msm8916-wcd-digital: move gains from SX_TLV to S8_TLV

move all the digital gains form using SX_TLV to S8_TLV, these gains are
actually 8 bit gains with 7th signed bit and ranges from -84dB to +40dB

rest of the Qualcomm wcd codecs uses these properly.

Fixes: ef8a4757 ("ASoC: msm8916-wcd-digital: Add sidetone support")
Fixes: 150db8c5 ("ASoC: codecs: Add msm8916-wcd digital codec")
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20220609111901.318047-2-srinivas.kandagatla@linaro.org


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