ASoC: Intel: add sof-cs42l42 machine driver

The machine driver is a generic machine driver for SOF with cs42l42
I2C codec. It currently supports Maxim MAX98357A speker amp on GLK
but is extensible for other apms and platforms.

Signed-off-by: Brent Lu <brent.lu@intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20210505163705.305616-13-pierre-louis.bossart@linux.intel.com


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