rsu_write_region_1
rsu_write_region_1(sc, addr, &val, 1);
rsu_write_region_1(sc, addr, (uint8_t *)&val, 2);
rsu_write_region_1(sc, addr, (uint8_t *)&val, 4);
static int rsu_write_region_1(struct rsu_softc *, uint16_t, uint8_t *,
rsu_write_region_1(sc, R92S_MACID, macaddr, IEEE80211_ADDR_LEN);