drm/msm/sde: update fences to be compatible with kernel 4.14

This patch updates the SDE DRM and V4L2 rotator drivers to use
the updated dma_fence API in kernel 4.14.

Change-Id: Ie7837927ba533524c15841b9f28ac4651481db4d
Signed-off-by: Steve Cohen <cohens@codeaurora.org>