drm/msm/sde: fix msm drm driver probe sequence

Fix msm drm driver probe and binding based
on downstream implementation to support the
connector property. The patch also fixes the
smmu driver optional binding to switch physical
domain dynamically.

Change-Id: Ie857f215054fab3f2b91282173ee968d093ccadb
Signed-off-by: Dhaval Patel <pdhaval@codeaurora.org>