Allow TPIC and Wifi module to use SPI pins at the same time.

[NathanJesudason]

Describe the feature you'd like The question is whether we can disable interrupts during times that we write to the shift register so that the wifi module is buffered.

AC:

• Make a separate branch for testing this and DO NOT MERGE, since it's highly experimental/theorectical

[NathanJesudason]

Wifi module has a chip select pin, so we should be able to use that so that the wifi module and shift register https://learn.adafruit.com/assets/110927

[NathanJesudason]

for writing to shift register, disable interrupts, Keep CS pin high until we write, then we set it low, write to it then set CS pin high and re-enable interrupts for shift register.

We just need some chip select (GPIO 9, pin 21), SCK, MOSI, MISO