drm/msm/sde: update encoder dmesg logging to use sde macros

This change modifies the video and command mode encoders to use
local sde defined macros for debug and error logging rather than
standard drm ones. The local sde macros allow the logs to be
enabled both from the normal drm_debug and Linux dynamic debug
interfaces.

Change-Id: I25775dbe30f140f3833b3aa7c735f31bbc987f26
Signed-off-by: Clarence Ip <cip@codeaurora.org>