drm/msm/sde: add kernel traces to measure enable/disable/kickoff times

Add kernel debug traces in drm to measure the performance of
the driver during enable/disable/commit/kickoff.

Change-Id: I7122e81b2c320f05bb42091971827908b7c6436f
Signed-off-by: Narendra Muppalla <NarendraM@codeaurora.org>