stm: Specify max endpoints for stm32f405xx
stm: Specify max endpoints for stm32f405xx

.. which is why we can't have HID or MIDI on the stm32f405 feather

adafruit/circuitpython,adafruit/circuitpython,adafruit/circuitpython,adafruit/circuitpython,adafruit/circuitpython,adafruit/circuitpython