Revert "msm: mdss: enable vsync event during continuous splash"

This reverts commit d6790b6d55ca6c74daf4056c40af174f50134cb2.
Revert "mdss: display: edp continuous splash support"

This reverts commit 6f759d6560deabbf6a2b17d95b992c77994a9096.
Revert "msm: mdss: Implement overlay handoff for continuous splash screen"

This reverts commit 4cffbf848fa4659ee0d669f098b1e178744f4c33.
Revert "msm: mdss: Detach mdss iommu on static screen"

This reverts commit b87b4c5a7d25c507fa364593302bda1766bfb2ed.