tests/kconfig_features: Add atmega128x-based boards to whitelist
tests/kconfig_features: Add atmega128x-based boards to whitelist

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