boards/stm32: adapt common i2c config to f7 and l4
boards/stm32: adapt common i2c config to f7 and l4

authmillenon/RIOT,miri64/RIOT,OTAkeys/RIOT,yogo1212/RIOT,josephnoir/RIOT,RIOT-OS/RIOT,josephnoir/RIOT,rfuentess/RIOT,mtausig/RIOT,ant9000/RIOT,kYc0o/RIOT,toonst/RIOT,mtausig/RIOT,lazytech-org/RIOT,A-Paul/RIOT,x3ro/RIOT,rfuentess/RIOT,A-Paul/RIOT,A-Paul/RIOT,smlng/RIOT,authmillenon/RIOT,mfrey/RIOT,aeneby/RIOT,mtausig/RIOT,josephnoir/RIOT,x3ro/RIOT,jasonatran/RIOT,OlegHahm/RIOT,OTAkeys/RIOT,OlegHahm/RIOT,ant9000/RIOT,toonst/RIOT,yogo1212/RIOT,miri64/RIOT,A-Paul/RIOT,mtausig/RIOT,josephnoir/RIOT,smlng/RIOT,smlng/RIOT,aeneby/RIOT,authmillenon/RIOT,rfuentess/RIOT,cladmi/RIOT,basilfx/RIOT,authmillenon/RIOT,kaspar030/RIOT,toonst/RIOT,mtausig/RIOT,toonst/RIOT,BytesGalore/RIOT,lazytech-org/RIOT,x3ro/RIOT,miri64/RIOT,RIOT-OS/RIOT,OlegHahm/RIOT,kaspar030/RIOT,yogo1212/RIOT,jasonatran/RIOT,ant9000/RIOT,rfuentess/RIOT,authmillenon/RIOT,cladmi/RIOT,basilfx/RIOT,RIOT-OS/RIOT,aeneby/RIOT,BytesGalore/RIOT,lazytech-org/RIOT,cladmi/RIOT,RIOT-OS/RIOT,smlng/RIOT,kYc0o/RIOT,kaspar030/RIOT,basilfx/RIOT,OTAkeys/RIOT,josephnoir/RIOT,smlng/RIOT,mfrey/RIOT,mfrey/RIOT,mfrey/RIOT,BytesGalore/RIOT,kYc0o/RIOT,kaspar030/RIOT,A-Paul/RIOT,BytesGalore/RIOT,toonst/RIOT,x3ro/RIOT,basilfx/RIOT,lazytech-org/RIOT,basilfx/RIOT,BytesGalore/RIOT,aeneby/RIOT,mfrey/RIOT,x3ro/RIOT,ant9000/RIOT,kYc0o/RIOT,OlegHahm/RIOT,cladmi/RIOT,rfuentess/RIOT,jasonatran/RIOT,kYc0o/RIOT,kaspar030/RIOT,aeneby/RIOT,OlegHahm/RIOT,cladmi/RIOT,jasonatran/RIOT,jasonatran/RIOT,OTAkeys/RIOT,miri64/RIOT,yogo1212/RIOT,yogo1212/RIOT,RIOT-OS/RIOT,OTAkeys/RIOT,authmillenon/RIOT,lazytech-org/RIOT,ant9000/RIOT,yogo1212/RIOT,miri64/RIOT