vfio/pci: Pass HostIOMMUDevice to vIOMMU

vfio/pci: Pass HostIOMMUDevice to vIOMMU

With HostIOMMUDevice passed, vIOMMU can check compatibility with host
IOMMU, call into IOMMUFD specific methods, etc.

Originally-by: Yi Liu <yi.l.liu@intel.com>
Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
Signed-off-by: Yi Sun <yi.y.sun@linux.intel.com>
Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>