cpu/nrf52: fix typos
cpu/nrf52: fix typos

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