drm/msm/sde: enable one to one map on smmu

This change adds one to one mapping on smmu node
prior to enabling continuous splash.

Change-Id: Iea28d59f64d46e34d35fc93c1ac7e2bc18628691
Signed-off-by: Shashank Babu Chinta Venkata <sbchin@codeaurora.org>
[cohens@codeaurora.org: Resolved merge conflict porting to 4.14]
Signed-off-by: Steve Cohen <cohens@codeaurora.org>