net: add header with generic MQTT-SN defines
net: add header with generic MQTT-SN defines

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