l3gd20: fixed "l3gd20 test"
l3gd20: fixed "l3gd20 test"

don't reset after test, and leave us in correct polling mode

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