commander: get PRIME parameter back
commander: get PRIME parameter back

The PRIME param got lost on the way of the refactoring.

darknight-007/Firmware,jlecoeur/Firmware,mje-nz/PX4-Firmware,PX4/Firmware,mje-nz/PX4-Firmware,krbeverx/Firmware,PX4/Firmware,acfloria/Firmware,dagar/Firmware,mje-nz/PX4-Firmware,mcgill-robotics/Firmware,mje-nz/PX4-Firmware,jlecoeur/Firmware,dagar/Firmware,krbeverx/Firmware,PX4/Firmware,dagar/Firmware,acfloria/Firmware,dagar/Firmware,Aerotenna/Firmware,mcgill-robotics/Firmware,jlecoeur/Firmware,jlecoeur/Firmware,krbeverx/Firmware,krbeverx/Firmware,krbeverx/Firmware,Aerotenna/Firmware,PX4/Firmware,Aerotenna/Firmware,mje-nz/PX4-Firmware,dagar/Firmware,PX4/Firmware,Aerotenna/Firmware,jlecoeur/Firmware,acfloria/Firmware,mcgill-robotics/Firmware,dagar/Firmware,dagar/Firmware,darknight-007/Firmware,acfloria/Firmware,Aerotenna/Firmware,mje-nz/PX4-Firmware,krbeverx/Firmware,mcgill-robotics/Firmware,acfloria/Firmware,PX4/Firmware,mje-nz/PX4-Firmware,jlecoeur/Firmware,krbeverx/Firmware,darknight-007/Firmware,mcgill-robotics/Firmware,jlecoeur/Firmware,jlecoeur/Firmware,darknight-007/Firmware,acfloria/Firmware,Aerotenna/Firmware,PX4/Firmware,mcgill-robotics/Firmware,darknight-007/Firmware,Aerotenna/Firmware,acfloria/Firmware,mcgill-robotics/Firmware