nucleo-g474re: remove obsolete spi_divtable
nucleo-g474re: remove obsolete spi_divtable

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