drm/msm: change CSC matrix selection logic for CDM block

CDM block is always using a limited quantization range
matrix.

This can be overridden to use a full range matrix if
the sink supports override capability or the mode is a
non-CEA mode.

Adjust the matrix selection logic to accommodate these
conditions.

Change-Id: I708412a923fb0d47e798f35ebe14b4c2f1a72fc9
Signed-off-by: Abhinav Kumar <abhinavk@codeaurora.org>