soc: qcom: hab: add a dummy hypervisor

With such a dummy hypervisor, HAB driver can still be compiled
when no real hypervisor relevant files are available.

Moreover, it supports the connection creation between two local
processes over HAB socket pair and the message transaction over
such connection.

Change-Id: Ic9102ac3ce067ae8981b185c23bfadef3b4a020c
Signed-off-by: Yong Ding <yongding@codeaurora.org>