pmw3901 driver: added integrator
pmw3901 driver: added integrator

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