ASoC: max98396: add amplifier driver

This series of patches adds support for Analog Devices MAX98396
mono amplifier with IV sense. The device provides a PCM interface
for audio data and a standard I2C interface for control data
communication. This driver also supports MAX98397 which is
a variant of MAX98396 with wide input supply range.

Signed-off-by: Ryan Lee <ryan.lee.analog@gmail.com>
Reported-by: kernel test robot <lkp@intel.com>
Link: https://lore.kernel.org/r/20220423021558.1773598-1-ryan.lee.analog@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>