hwc2: add support to enforce pipe split for built-in display

Add support to enforce pipe split when there is only one
built-in display connected when the panel fps is above 60.
This is needed to keep MDP clock down for high fps
use-cases.

Change-Id: Ie8cdd8eb45df98684d04ac8c96552fa33484d93b
CRs-Fixed: 2512607
5 files changed