ASoC: Intel: sof_sdw: add mutual exclusion between PCH DMIC and RT715

ASoC: Intel: sof_sdw: add mutual exclusion between PCH DMIC and RT715

When external RT714/715 devices are used for capture, we don't want
the PCH DMICs to be used.

Any information provided by the SOF platform driver or DMI quirks will
be overridden.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Reviewed-by: Libin Yang <libin.yang@intel.com>
Link: https://lore.kernel.org/r/20210505163705.305616-5-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>