ASoC: Intel: Add KeemBay platform driver

Add KeemBay ASoC platform driver which initialize the i2s controller
and uses i2s to capture and transmit pcm data to external codec.
The i2s is running in polling mode.

Signed-off-by: Michael Sit Wei Hong <michael.wei.hong.sit@intel.com>
Signed-off-by: Sia Jee Heng <jee.heng.sia@intel.com>
Link: https://lore.kernel.org/r/1591682783-1923-2-git-send-email-jee.heng.sia@intel.com


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