soc: qcom: Enable wcd glink driver for BG

Enable wcd glink driver for platform with BG support. Also
add support to configure the glink edge which is used
for glink communication between the msm and the target
device.

Change-Id: I1b4a888a40a8f4187bc384494fe3ac97a864756a
Signed-off-by: Ashish Jain <ashishj@codeaurora.org>