dsp0401: move to display devices doxygen group
dsp0401: move to display devices doxygen group

basilfx/RIOT,OTAkeys/RIOT,miri64/RIOT,jasonatran/RIOT,basilfx/RIOT,RIOT-OS/RIOT,smlng/RIOT,basilfx/RIOT,authmillenon/RIOT,miri64/RIOT,RIOT-OS/RIOT,RIOT-OS/RIOT,ant9000/RIOT,kaspar030/RIOT,yogo1212/RIOT,yogo1212/RIOT,jasonatran/RIOT,smlng/RIOT,OTAkeys/RIOT,miri64/RIOT,miri64/RIOT,kaspar030/RIOT,kYc0o/RIOT,yogo1212/RIOT,smlng/RIOT,OTAkeys/RIOT,yogo1212/RIOT,kaspar030/RIOT,kaspar030/RIOT,kYc0o/RIOT,kYc0o/RIOT,yogo1212/RIOT,ant9000/RIOT,jasonatran/RIOT,miri64/RIOT,jasonatran/RIOT,authmillenon/RIOT,ant9000/RIOT,smlng/RIOT,yogo1212/RIOT,OTAkeys/RIOT,jasonatran/RIOT,authmillenon/RIOT,ant9000/RIOT,kYc0o/RIOT,kYc0o/RIOT,authmillenon/RIOT,RIOT-OS/RIOT,OlegHahm/RIOT,OlegHahm/RIOT,basilfx/RIOT,OTAkeys/RIOT,kaspar030/RIOT,authmillenon/RIOT,smlng/RIOT,ant9000/RIOT,basilfx/RIOT,OlegHahm/RIOT,authmillenon/RIOT,OlegHahm/RIOT,RIOT-OS/RIOT,OlegHahm/RIOT