drivers/usbdev_mock: add to drivers_misc category
drivers/usbdev_mock: add to drivers_misc category

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