The generic IOMMU device-tree bindings can be used to add arbitrary OF
masters to an IOMMU with a compliant binding.

This patch introduces of_iommu_configure, which does exactly that.
Acked-by: NArnd Bergmann <arnd@arndb.de>
Acked-by: NJoerg Roedel <jroedel@suse.de>
Acked-by: NMarek Szyprowski <m.szyprowski@samsung.com>
Tested-by: NRobin Murphy <robin.murphy@arm.com>
Signed-off-by: NWill Deacon <will.deacon@arm.com>