boards/nucleo-f413zh: declare adc_config[] directly in periph_conf.h
boards/nucleo-f413zh: declare adc_config[] directly in periph_conf.h

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