The usbfs receive buffers must also have space for the 2 byte crc at
the end of a transmission. This fixes an error that could lead to
lost messages from mcu to host (resulting in bytes_invalid increasing
in stats) on the stm32f103.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Now that the code in stm32f4/ can handle both stm32f1 and stm32f4
chips, rename the directory to just "stm32".
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>