tests/usbus_cdc_ecm: Default to RIOT peripheral PID
tests/usbus_cdc_ecm: Default to RIOT peripheral PID

OlegHahm/RIOT,kYc0o/RIOT,RIOT-OS/RIOT,ant9000/RIOT,toonst/RIOT,kYc0o/RIOT,smlng/RIOT,mtausig/RIOT,miri64/RIOT,kYc0o/RIOT,x3ro/RIOT,OlegHahm/RIOT,yogo1212/RIOT,yogo1212/RIOT,toonst/RIOT,OTAkeys/RIOT,basilfx/RIOT,jasonatran/RIOT,basilfx/RIOT,RIOT-OS/RIOT,jasonatran/RIOT,basilfx/RIOT,RIOT-OS/RIOT,basilfx/RIOT,jasonatran/RIOT,mtausig/RIOT,mtausig/RIOT,mtausig/RIOT,authmillenon/RIOT,yogo1212/RIOT,miri64/RIOT,kYc0o/RIOT,jasonatran/RIOT,authmillenon/RIOT,authmillenon/RIOT,miri64/RIOT,smlng/RIOT,toonst/RIOT,toonst/RIOT,x3ro/RIOT,ant9000/RIOT,kaspar030/RIOT,OlegHahm/RIOT,RIOT-OS/RIOT,yogo1212/RIOT,authmillenon/RIOT,miri64/RIOT,kaspar030/RIOT,kaspar030/RIOT,yogo1212/RIOT,x3ro/RIOT,smlng/RIOT,miri64/RIOT,ant9000/RIOT,OTAkeys/RIOT,ant9000/RIOT,OlegHahm/RIOT,kYc0o/RIOT,OTAkeys/RIOT,basilfx/RIOT,kaspar030/RIOT,smlng/RIOT,x3ro/RIOT,RIOT-OS/RIOT,OTAkeys/RIOT,OTAkeys/RIOT,smlng/RIOT,mtausig/RIOT,yogo1212/RIOT,authmillenon/RIOT,jasonatran/RIOT,ant9000/RIOT,kaspar030/RIOT,authmillenon/RIOT,x3ro/RIOT,toonst/RIOT,OlegHahm/RIOT