tiltrotor: only allow increasing tilt during first part of transition
tiltrotor: only allow increasing tilt during first part of transition

Signed-off-by: Silvan Fuhrer <38928ccc4ba1624d4c70454b92c2d93a502f06b9@auterion.com>

acfloria/Firmware,acfloria/Firmware,acfloria/Firmware,acfloria/Firmware,acfloria/Firmware,acfloria/Firmware,acfloria/Firmware