Add compatibility with Arduino R4 boards #125
Merged
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After scratching my head about why my new 2.13" Monochrome eInk / ePaper Display
wasn't working with the Uno R4 after working perfectly with an R3, I added
ARDUINO_UNOR4_MINIMA and ARDUINO_UNOR4_WIFI to the list of boards
in Adafruit_SPIDevice.h that don't support BUSIO_USE_FAST_PINIO.
No limitations that I'm aware of.
Tested with some of the examples in Adafruit_EPD as well as my own code and it seems
stable.