Revert "drm/msm/sde: take spin lock around encoder vblank registration"

This reverts commit af645345f2ae (
"drm/msm/sde: take spin lock around encoder vblank registration").

This patch introduces deadlock between interrupt callback upward
calling path, and commit/idle pc worker downward calling paths.
This patch is reverted as a result.

Change-Id: I6d6470083f23912a475be3a21f6bd481c61df488
Signed-off-by: Lloyd Atkinson <latkinso@codeaurora.org>
2 files changed