msm: iommu: Add functions to map/unmap an address range
msm: iommu: Add functions to map/unmap an address range

Implement the iommu_map_range / iommu_unmap_range ops in
the MSM IOMMU driver.

Change-Id: I87da7b9ec3a3c1f7e6c45ad5d9de497b12e6595f
Signed-off-by: Stepan Moskovchenko <4b3f23b045e38e54cffd83d34440316666b35af9@codeaurora.org>

TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas