ba_is_4
extern int ba_is_4(topo_mod_t *, did_t *);
{ 0, 0, 0, -1, -1, "PCIExp SLOT0", ba_is_4 },
{ 0, 2, 2, -1, -1, "PCIExp SLOT1", ba_is_4 },
{ 0, 4, 4, -1, -1, "PCIExp SLOT2", ba_is_4 }