STM32F4xx: added definition of compatibility macros for new CMSIS headers
boards: changed STM32F4xx chip defines to match updated CMSIS headers
STM32F4xx: added support for STM32F411
boards: added ST_NUCLEO_F411RE
STM32F4xx: fixed bad wait states for STM32F401
GPIOv2: fixed usage of non existing GPIO ports in bitmask