be3e478fce
Despite the [silk on the dock board](https://wiki.makerdiary.com/nrf52840-m2-devkit/resources/nrf52840_m2_devkit_hw_diagram_v1_0.pdf), the SDA/SCL pins weren't defined. Though, they were already defined in `mpconfigboard.h`. Same for RX/TX. It looks like it declared `TXD` and `RXD`, so I didn't want to remove those, but I think it makes sense to have the "standard" pin names, but I moved ithem to illustrate they were all referencing the same pins. I mimicked the whitespace I saw in the metro_nrf52840_express port.
Makerdiary nRF52840 M.2 Developer Kit
The devkit is a versatile IoT prototyping platform, including the nRF52840 M.2 Module and M.2 Dock. You can use the developer kit to prototype your IoT products and then scale to production faster using the nRF52840 M.2 Module combined with your custom PCB hardware.
Refer to https://github.com/makerdiary/nrf52840-m2-devkit for more details.