drm/msm: call deprecated arm iommu APIs temporarily

This change replaces iommu API calls with their
respective deprecated function calls. These deprecated
API calls will be removed once msm display driver
supports upstream ARM APIs.

Change-Id: I7b455699f7a035136a93bc67261d6cdc8406eee2
Signed-off-by: Samantha Tran <samtran@codeaurora.org>
Signed-off-by: Dhaval Patel <pdhaval@codeaurora.org>