Backwards compatible version of SERIAL_UDB_EXTRA F6: format

                sue_PITCHGAIN             : Serial UDB Extra PITCHGAIN Proportional Control (float)
                sue_PITCHKD               : Serial UDB Extra Pitch Rate Control (float)
                sue_RUDDER_ELEV_MIX        : Serial UDB Extra Rudder to Elevator Mix (float)
                sue_ROLL_ELEV_MIX         : Serial UDB Extra Roll to Elevator Mix (float)
                sue_ELEVATOR_BOOST        : Gain For Boosting Manual Elevator control When Plane Stabilized (float)

def serial_udb_extra_f6_encode(self, sue_PITCHGAIN, sue_PITCHKD, sue_RUDDER_ELEV_MIX, sue_ROLL_ELEV_MIX, sue_ELEVATOR_BOOST):
                '''
                Backwards compatible version of SERIAL_UDB_EXTRA F6: format

                sue_PITCHGAIN             : Serial UDB Extra PITCHGAIN Proportional Control (float)
                sue_PITCHKD               : Serial UDB Extra Pitch Rate Control (float)
                sue_RUDDER_ELEV_MIX        : Serial UDB Extra Rudder to Elevator Mix (float)
                sue_ROLL_ELEV_MIX         : Serial UDB Extra Roll to Elevator Mix (float)
                sue_ELEVATOR_BOOST        : Gain For Boosting Manual Elevator control When Plane Stabilized (float)

                '''
                return MAVLink_serial_udb_extra_f6_message(sue_PITCHGAIN, sue_PITCHKD, sue_RUDDER_ELEV_MIX, sue_ROLL_ELEV_MIX, sue_ELEVATOR_BOOST)