rge_read_ephy
uint16_t rge_read_ephy(struct rge_softc *, uint16_t);
val = rge_read_ephy(sc, 0x002a) & ~0x7000;
val = rge_read_ephy(sc, 0x006a) & ~0x7000;
rge_write_ephy(sc, reg, rge_read_ephy(sc, reg) | (val))
rge_write_ephy(sc, reg, rge_read_ephy(sc, reg) & ~(val))