disp: msm: sde: add on/off and payload size logging for LUTDMA

Debugging of LUTDMA has proven to be difficult due to lacking
information. Add logging for payload sizing, feature on / off,
and dumping of 64-bit buffer addresses.

Change-Id: I6d421f65172a782b79e915501ec9ea00d05dbcdd
Signed-off-by: Christopher Braga <cbraga@codeaurora.org>