tas2770: add tas2770 smart PA kernel driver

add tas2770 smart PA kernel driver

Signed-off-by: Frank Shi <shifu0704@thundersoft.com>
Link: https://lore.kernel.org/r/1568962709-19185-2-git-send-email-shifu0704@thundersoft.com
Signed-off-by: Mark Brown <broonie@kernel.org>
4 files changed