drivers/vfio: allow type-1 IOMMU instantiation on top of an ARM SMMU

The ARM SMMU driver is compatible with the notion of a type-1 IOMMU in
VFIO.

This patch allows VFIO_IOMMU_TYPE1 to be selected if ARM_SMMU=y.
Signed-off-by: Will Deacon <will.deacon@arm.com>
[aw: update for existing S390 patch]
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>

drivers/vfio/Kconfig

@@ -16,7 +16,7 @@ config VFIO_SPAPR_EEH
 menuconfig VFIO
 	tristate "VFIO Non-Privileged userspace driver framework"
 	depends on IOMMU_API
-	select VFIO_IOMMU_TYPE1 if (X86 || S390)
+	select VFIO_IOMMU_TYPE1 if (X86 || S390 || ARM_SMMU)
 	select VFIO_IOMMU_SPAPR_TCE if (PPC_POWERNV || PPC_PSERIES)
 	select VFIO_SPAPR_EEH if (PPC_POWERNV || PPC_PSERIES)
 	select ANON_INODES