alsa_sound: Add MI2S usecase

** Long to do

Change-Id: I8df6bf9bfb641002849cb001b0c660012700e9cf
Signed-off-by: Brandon McAnsh <brandon.mcansh@gmail.com>
Merge branch 'mi2s' of https://github.com/BMc08GT/hardware_qcom_audio-caf into mi2s