disp: msm: sde: Add checksum support for LTM for lahaina target

This change adds the support for checksum collection and notifies
to user space as part of drm event.

Change-Id: Ib2a6c38c74d1fb60d274cdb685b74979202604eb
Signed-off-by: Lakshmi Narayana Kalavala <lkalaval@codeaurora.org>