wpi_set_pslevel
int wpi_set_pslevel(struct wpi_softc *, int, int, int);
error = wpi_set_pslevel(sc, 0, 3, 0);
error = wpi_set_pslevel(sc, 0, 0, 0);
if ((error = wpi_set_pslevel(sc, 0, 0, 0)) != 0) {
(void)wpi_set_pslevel(sc, 0, 3, 1);