pkg/spiffs: implement format from vfs
pkg/spiffs: implement format from vfs

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