ASoC: rt1019: add rt1019 amplifier driver

This is initial amplifier driver for rt1019.

Signed-off-by: Jack Yu <jack.yu@realtek.com>
Link: https://lore.kernel.org/r/20210311025809.31852-1-jack.yu@realtek.com


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