drm/msm/sde: add clock control parsing to hardware catalog

Add parsing logic to setup plane and writeback control clock
register and bit mask.  Clock control registers are used to
change vbif OT settings.

Change-Id: Ie3baee8c25c2899f14c3d0e87e02dc57d73ce582
Signed-off-by: Alan Kwong <akwong@codeaurora.org>