pcie_topo_node_create
tn = pcie_topo_node_create(mod, pcie, pnode, NULL, "link", 0);
tn = pcie_topo_node_create(mod, pcie, tn, NULL, "port", 0);
port = pcie_topo_node_create(mod, pcie, pnode, NULL,
dev = pcie_topo_node_create(mod, pcie, port, NULL,
func = pcie_topo_node_create(mod, pcie, dev, node, "function", fninst);
fn = pcie_topo_node_create(mod, pcie, pnode, func,
cpu = pcie_topo_node_create(mod, pcie, pnode, NULL,
rcnode = pcie_topo_node_create(mod, pcie, pnode, rc,