PVID_OFF
val &= ~(PVID_MASK << PVID_OFF(i));
val |= (vid << PVID_OFF(i));
*pvid = (MTKSWITCH_READ(sc, MTKSWITCH_PVID(port)) >> PVID_OFF(port)) &
val &= ~(PVID_MASK << PVID_OFF(port));
val |= (pvid & PVID_MASK) << PVID_OFF(port);