ASoC: Intel: CHT: add support for pcm512x boards

Add support for Cherrytrail boards, using the pcm512x audio codec
using the new sof_pcm512x machine driver.

Signed-off-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20200129223603.2569-4-pierre-louis.bossart@linux.intel.com


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