audio-lnx: Initial change for techpack of audio drivers.

Add snapshot for audio drivers for SDM targets. The code is
migrated from msm-4.9 kernel at the below cutoff -

(74ff856e8d6: "net: ipc_router: Add dynamic enable/disable
wakeup source feature")

This changes are done for new techpack addition
for audio kernel. Migrate all audio kernel drivers
to this techpack.

Change-Id: I33d580af3ba86a5cb777583efc5d4cdaf2882d93
Signed-off-by: Asish Bhattacharya <asishb@codeaurora.org>