msm: mdss: Update writeback CDM CSC configuration

The CDM CSC registers for writeback are currently written during the
validate stage of atomic commit. This logic is incorrect, and the
CSC register should be configured during the commit. The CSC table
being used is incorrect as well. This change fixes the tables being
used and when the table is configured.

Change-Id: Ica1e743d5ec70b6f652f37c059db39520d485628
Signed-off-by: Benet Clark <benetc@codeaurora.org>