boards/samd21-arduino: exclude reset with usb-board-reset macro
boards/samd21-arduino: exclude reset with usb-board-reset macro

kYc0o/RIOT,OlegHahm/RIOT,basilfx/RIOT,RIOT-OS/RIOT,miri64/RIOT,ant9000/RIOT,kYc0o/RIOT,yogo1212/RIOT,authmillenon/RIOT,authmillenon/RIOT,kaspar030/RIOT,ant9000/RIOT,miri64/RIOT,yogo1212/RIOT,OTAkeys/RIOT,RIOT-OS/RIOT,kaspar030/RIOT,OlegHahm/RIOT,OlegHahm/RIOT,basilfx/RIOT,miri64/RIOT,kaspar030/RIOT,RIOT-OS/RIOT,RIOT-OS/RIOT,basilfx/RIOT,jasonatran/RIOT,OlegHahm/RIOT,jasonatran/RIOT,ant9000/RIOT,ant9000/RIOT,OTAkeys/RIOT,authmillenon/RIOT,authmillenon/RIOT,jasonatran/RIOT,RIOT-OS/RIOT,OTAkeys/RIOT,miri64/RIOT,authmillenon/RIOT,kaspar030/RIOT,OlegHahm/RIOT,authmillenon/RIOT,kYc0o/RIOT,ant9000/RIOT,kYc0o/RIOT,OTAkeys/RIOT,kaspar030/RIOT,jasonatran/RIOT,yogo1212/RIOT,OTAkeys/RIOT,miri64/RIOT,yogo1212/RIOT,basilfx/RIOT,basilfx/RIOT,kYc0o/RIOT,jasonatran/RIOT,yogo1212/RIOT,yogo1212/RIOT