drivers misc: add misc okl4 hypervisor drivers

Add miscellaneous drivers which serve as examples for
using okl4 hypervisor APIs.

Change-Id: I597f2d77bc5af2b7b05279364041b37c16b86b8b
Signed-off-by: Carl van Schaik <carl@cog.systems>
Git-commit: 312e4c5d63828fb7283bbea4416fabeb5979db36
Git-repo: https://github.com/CogSystems/linux-msm/commits/msm-4.9-hyp


[mnalajal@codeaurora: Resolve trivial merge conflicts]
Signed-off-by: Murali Nalajala <mnalajal@codeaurora.org>
Signed-off-by: Prakruthi Deepak Heragu <pheragu@codeaurora.org>