ext: replace old STM libs with new CMSIS from STMCube
STM32: clock: use new register names
STM32: gpio: use new register names
STM32: can: use new register names
STM32: adc: use new register names
xml: stm32f4: use new cmsis files
xml: stm32f3: use new cmsis files
xml: stm32f0: use new cmsis files

Still [wip].