ASoC: msm : Add DLKM support for BG glink driver

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: I59d748aeee401cf4e373b154dadd156799cd5b6b
Signed-off-by: Raja Mallik <rmallik@codeaurora.org>
Signed-off-by: Chinkit Kumar,Kirti Kumar Parmar <parma@codeaurora.org>
Signed-off-by: Sundara Vinayagam <sundvi@codeaurora.org>