ieee802154/submac: fix default SubGHz page
ieee802154/submac: fix default SubGHz page

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