ASoC: Intel: bytct_rt5640: change default capture settings

Most Baytrail-CR devices use analog differential microphones,
modify capture default to avoid DMI quirks. Keep digital mics
for all other configurations.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>