mtd: add documentation & do cleanup (remove err(), ...)
mtd: add documentation & do cleanup (remove err(), ...)

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