ykbec_write
void ykbec_write(struct ykbec_softc *, u_int, u_int);
ykbec_write(sc, REG_USB0, USB_FLAG_OFF);
ykbec_write(sc, REG_USB1, USB_FLAG_OFF);
ykbec_write(sc, REG_USB2, USB_FLAG_OFF);
ykbec_write(sc, REG_PMUCFG, ctrl);
ykbec_write(sc, REG_FAN_CONTROL, REG_FAN_OFF);
ykbec_write(sc, REG_FAN_CONTROL, REG_FAN_ON);
ykbec_write(sc, REG_USB0, USB_FLAG_ON);
ykbec_write(sc, REG_USB1, USB_FLAG_ON);
ykbec_write(sc, REG_USB2, USB_FLAG_ON);
ykbec_write(sc, REG_BEEP_CONTROL, bctrl & ~BEEP_ENABLE);
ykbec_write(sc, REG_BEEP_CONTROL, bctrl | BEEP_ENABLE);
ykbec_write(sc, REG_BEEP_CONTROL, bctrl & ~BEEP_ENABLE);
ykbec_write(sc, REG_BEEP_CONTROL,