soc: qcom: add wcd-dsp-glink platform driver

wcd-dsp-glink platform driver is added to send/receive data and
commands to/from DSP in WCD audio codec over glink. This driver
provides read and write interface to userspace to send/receive
data and commands.

CRs-Fixed: 1053381
Change-Id: I0405ae31201f966c7a3cd52c37191578e960dd71
Signed-off-by: Vidyakumar Athota <vathota@codeaurora.org>
Signed-off-by: Nagaradhesh Yeleswarapu <nagaradh@qti.qualcomm.com>