cpu/stm32_common: add STM32_FLASHSIZE constant
cpu/stm32_common: add STM32_FLASHSIZE constant

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