soc: qcom: Add hypervisor abstraction driver

This new driver is meant to be a cross-platform abstraction
layer for utilizing the underlying hypervisor system.
This API can be accessed from both user and kernel sides.
The intended users of this are the multimedia drivers who want
to communicate with the host OS to use the multimedia hardware.

Change-Id: I37743df490d14249a9d378225771367750899eb0
Signed-off-by: Edward Lee <eleekimk@codeaurora.org>