drivers/saul: add proximity sensor type
drivers/saul: add proximity sensor type

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