drm/msm: add evtlog and fault handler to smmu

Add eventt log to map and unmap to capture smmu sequence.
Add fault handler to dump eventlog in case of smmu fault.

CRs-Fixed: 2046593
Change-Id: Ie51757a0730d87b5395e859e44d361bd59e858ba
Signed-off-by: Alan Kwong <akwong@codeaurora.org>