nand_attach_mi
chip->chip_dev = nand_attach_mi(nand, sc->sc_dev);
sc->sc_nanddev = nand_attach_mi(&sc->sc_nand_if, sc->sc_dev);
sc->sc_nanddev = nand_attach_mi(&sc->sc_nand_if, self);
device_t nand_attach_mi(struct nand_interface *, device_t);
sc->sc_nanddev = nand_attach_mi(&sc->sc_nand_if, sc->sc_dev);