cleanup uavcan_main: replace warnx with PX4_{INFO,ERR,DEBUG}
cleanup uavcan_main: replace warnx with PX4_{INFO,ERR,DEBUG}

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