aintr_enabled
if (aintr_enabled(vrtc) && oldtime != VRTC_BROKEN_TIME)
if (aintr_enabled(vrtc)) {
} else if (aintr_enabled(vrtc) && update_enabled(vrtc)) {
if (aintr_enabled(vrtc) || uintr_enabled(vrtc)) {
if ((aintr_enabled(vrtc) && (newval & RTCIR_ALARM) != 0) ||