When using online compiler (Keil) SystemInit (and systick stuff) is call
before RW data is initialized, so static and global variables contains
garbage. AHBPrescTable was one of these.
This is the initial port of the mbed SDK to STM32F3XX (Tested with STM32F3Discovery and hello world test.)
This port is based on the NUCLEO_F302R8 target.
Only the GCC_ARM toolchain has been tested.