drm/msm/sde: propagate the cdm block length from the catalog

Add the missing CDM block length parsed by the hardware catalog
into the hardware block data structure so that the debug dump
region can be properly registered.

Change-Id: I395164960484ede34a781785b4ed0e2a60ef0e50
Signed-off-by: Lloyd Atkinson <latkinso@codeaurora.org>