Add snapshot for audio drivers for MSM targets. The code is
migrated from msm-3.18 kernel at the below commit/AU level -
AU_LINUX_ANDROID_LA.HB.1.3.1.06.00.00.187.056
(e70ad0cd5efdd9dc91a77dcdac31d6132e1315c1)
(Promotion of kernel.lnx.3.18-151201.)
Signed-off-by: Sudheer Papothi <spapothi@codeaurora.org>