ASoC: Add drivers to support BG codec driver

Add audio codec driver to configure BG audio codec.
Add glink client driver to send audio commands to audio
client. BG audio codec driver communicates with the BG
using the glink client driver.

Change-Id: I2795e75a522478e65e79c19dcf062d3e157ca26a
Signed-off-by: Yeleswarapu Nagaradhesh <nagaradh@codeaurora.org>
Signed-off-by: Ashish Jain <ashishj@codeaurora.org>