disp: msm: sde: handle partial update use case in rounded corner

Currently, driver expects usermode to set RC blob flags based on
the RC PU use case, which causes issue when commits are staggered
and is unnecessarily reprogramming RC mask data on every PU frame.
This change uses existing driver logic to internally determine the
RC PU use case and programs the RC region enable bits accordingly.
It also adds essential logging in RC functions to help debugging.

Change-Id: I19ae59a79dbee20f357b384c12acd7d2a6a93fb4
Signed-off-by: Anjaneya Prasad Musunuri <aprasad@codeaurora.org>