iommu/arm-smmu: Merge of smmu changes from 4.14 to msm-kona

This patch is to merge all of iommu/smmu, DMA, fast and lazy
mapping changes from msm-4.14 to msm-kona.

Change-Id: I08777236f45357b7cf44f5c14c80b78eaa482294
Signed-off-by: Swathi Sridhar <swatsrid@codeaurora.org>