ASoC: Intel: BXT: switch pcm512x based boards to sof_pcm512x

Switch over Broxton platforms with the pcm512x codec from the legacy
bxt-pcm512x to the new sof_pcm512x machine driver.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
Link: https://lore.kernel.org/r/20200129223603.2569-3-pierre-louis.bossart@linux.intel.com


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