Fix memory config for STM32F4
Fix memory config for STM32F4

The previous memory map didn't allow to debug the whole flash
memory. A new configuration has been added and should be
used while working with the STM32F4Discovery.

trigrass2/stlink,chaosAD/stlink,chaosAD/stlink,fedorcomander/stlink,swegener/stlink,gtalusan/stlink,12019/stlink,trigrass2/stlink,ros2/stlink,gtalusan/stlink,simonjwright/stlink,swegener/stlink,simonjwright/stlink,fedorcomander/stlink,braincorp/stlink,braincorp/stlink,12019/stlink,ros2/stlink