Add support for Makerdiary nRF52840 MDK dongle#46

Open

Brezensalzer wants to merge 9 commits intosoburi:masterfrom Brezensalzer:master

+12,091-21

Commits on Jan 23, 2022

added vriant for Makerdiary nRF52840 MDK USB Dongle
Dr. Stefan Labich
committed
added new variant to boards.txt
Dr. Stefan Labich
committed
added bootloader for new board
Dr. Stefan Labich
committed

Commits on Jan 25, 2022

fixed pins 20/21 not usable?)
Dr. Stefan Labich
committed

Commits on Jan 28, 2022

fixed obfuscated pin numbering
Dr. Stefan Labich
committed
added SPI pin definition
Dr. Stefan Labich
committed
added bootloader firmware
Dr. Stefan Labich
committed

Commits on Jan 29, 2022

fixed analog pin definition
Dr. Stefan Labich
committed

Commits on Feb 2, 2022

fixed board definition
Dr. Stefan Labich
committed