machine/itsybitsy-nrf52840: add support for Adafruit Itsybitsy nrf52840#1243

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itsybitsy-nrf52840

Aug 25, 2020

Commits on Aug 25, 2020

machine/itsybitsy-nrf52840: add support for Adafruit Itsybitsy nrf52840 Express board
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machine/itsybitsy-nrf52840: correct pin mapping and USB CDC pid values
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docs: correct use of nRF in board description
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