The STM files are from the original `stm32cube_fw_f4_v190.zip`
archive, the folder:

* `STM32Cube_FW_F4_V1.9.0/Drivers/CMSIS/Device/ST/STM32F4xx/Include`

There should be no changes from the STM originals.

The `cmsis_device.h` was added for convenience.
