uthor FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> 1221216153 +0900
committer Ingo Molnar <mingo@elte.hu> 1221403356 +0200

iommu: add iommu_device_max_index IOMMU helper function

This function helps IOMMUs to know the highest address that a device
can access to.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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