soc: qcom: hab: code refactor to support OS and Hypervisor variants better

HAB(Hypervisor ABstraction) driver supports inter-OS communication with the
underlying Hypervisor's mechanism in some virtualization platforms.

There are different OSes and Hypervisors where HAB can work on. The change
refactors the code to move those code different among different OSes and/or
Hypervisors into some new files.

Change-Id: I63637577adf49e5d01bc56442b43d79330c3e872
Signed-off-by: Yong Ding <yongding@codeaurora.org>