ANDROID: GKI: add dma_map_ops remap/unremap operations

Trimmed down version of:
4008eb49 "iommu/arm-smmu: Merge of smmu changes from 4.14"
which includes only changes required for removed-dma-pool driver.

Bug: 145617272
Signed-off-by: Swathi Sridhar <swatsrid@codeaurora.org>
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Change-Id: I4b9ae665aaf8aabf89c3b158bc38db458f31657a