Revert "iommu/arm-smmu: Add IOMMU API TLB sync support"

This reverts commit c885e4aa.
This revert seems to be resolving the smmu faults seen in
slpi, cdsp and adsp. Have this revert used for more further
experiments done to conclude.

Change-Id: I188f2dfbe64c247fc3fd4a60c807c9c7ddd65249
Signed-off-by: Vinayak Menon <vinmenon@codeaurora.org>