ASoC: max98388: add amplifier driver

Added Analog Devices MAX98388 amplifier driver.
MAX98388 provides a PCM interface for audio data and a standard I2C
interface for control data communication.

Signed-off-by: Ryan Lee <ryans.lee@analog.com>
Link: https://lore.kernel.org/r/20230613060945.183128-2-ryan.lee.analog@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>