boards/nucleo-l433rc: use common rtt configuration
boards/nucleo-l433rc: use common rtt configuration

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