iommu/arm-smmu: add NVIDIA implementation for ARM MMU-500 usage

NVIDIA's Tegra194 SoC has three ARM MMU-500 instances.
It uses two of the ARM MMU-500s together to interleave IOVA
accesses across them and must be programmed identically.
This implementation supports programming the two ARM MMU-500s
that must be programmed identically.

The third ARM MMU-500 instance is supported by standard
arm-smmu.c driver itself.

Signed-off-by: Krishna Reddy <[email protected]>
Reviewed-by: Jon Hunter <[email protected]>
Reviewed-by: Nicolin Chen <[email protected]>
Reviewed-by: Pritesh Raithatha <[email protected]>
Reviewed-by: Robin Murphy <[email protected]>
Reviewed-by: Thierry Reding <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Will Deacon <[email protected]>

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