Revert "drm/msm/sde: programmable pre-fetch support for video encoders"

This reverts 'commit fe03524b ("drm/msm/sde: programmable
pre-fetch support for video encoders")'
This is partial change for display drm driver,
that will break drm/sde merge commit.

Change-Id: I978b0248f5e011abbb8cede98a56b3cb558f2d87
Signed-off-by: Narendra Muppalla <NarendraM@codeaurora.org>