iommu: arm-smmu: Merge for msm-kona kernel upgrade

Merge all iommu/smmu changes from msm-4.14 to msm-kona
as of:
'commit 681d7197 ("iommu/arm-smmu: ignore target
specific initialization")'

Change-Id: I4452531c17fe653a282e8923851eba3deae0e9b0
Signed-off-by: Swathi Sridhar <swatsrid@codeaurora.org>