ASoc: amd: Add DMIC switch capability to machine driver

Switch between DMIC0 and DMIC1 based on recording device selected.
This is done by toggling the dmic select gpio.

Signed-off-by: Akshu Agrawal <akshu.agrawal@amd.com>
Link: https://lore.kernel.org/r/20200302082443.51587-1-akshu.agrawal@amd.com


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