Revert "drm/msm/dsi-staging: add dsi definitions for new dsi driver"

This reverts 'commit 3d589da9 ("drm/msm/dsi-staging:
add dsi definitions for new dsi driver")'
This is partial change for display drm driver,
that will break drm/sde merge commit.

Change-Id: Icd478a54a07f9689dc0110382fd8b5de5c241a49
Signed-off-by: Narendra Muppalla <NarendraM@codeaurora.org>