rp2/boards: Add neopixel.py to manifest.py.
rp2/boards: Add neopixel.py to manifest.py.

Because machine.bitstream is now implemented on the rp2 port.

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