mc_pos_control: suppress vertical acceleration feed-forward during takeoff ramp
mc_pos_control: suppress vertical acceleration feed-forward during takeoff ramp

Because the takeoff ramp is a vertical velocity limit ramp for the
nice user experience but the acceleration feed-forward can
add on top of the output and depending on trajectory generation
result in unwanted thrust changes during the ramp.

PX4/Firmware,acfloria/Firmware,acfloria/Firmware,krbeverx/Firmware,PX4/Firmware,acfloria/Firmware,krbeverx/Firmware,krbeverx/Firmware,acfloria/Firmware,PX4/Firmware,acfloria/Firmware,PX4/Firmware,krbeverx/Firmware,krbeverx/Firmware,PX4/Firmware,PX4/Firmware,krbeverx/Firmware,acfloria/Firmware,krbeverx/Firmware,PX4/Firmware,acfloria/Firmware