unittests/fmt: adapt and enhance tests for sxx_dfp()
unittests/fmt: adapt and enhance tests for sxx_dfp()

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