Added board definition for upcoming Pimoroni servo driver.

[ZodiusInfuser]

A teaser can be seen here 🙂
https://twitter.com/i/status/1489298380270575616

With any luck we'll be launching next week

[tannewt]

Good luck with the launch! 🚀

[ZodiusInfuser]

Thanks! I thought you were on leave though 😉

[tannewt]

Soon!

[ZodiusInfuser]

Thanks for the merge! Though .... I've just re-compared the pinout to the schematic and LED_DAT should be LED_DATA 🤦. Do I need to raise a separate PR for that, or can the change be merged again if I just update this branch?

Also, we have the 3 ADC pins labelled ADC0, ADC1, and ADC2 in the schematic, but A0, A1, and A2 in the pin def. I believe that's to be consistent with CircuitPython's typical naming so probably doesn't need changing 🤷 .
Actually, scratch that. The pin labels on the board silk say A0, A1, and A2, so it's fine.

[ladyada]

once merged a PR cannot be amended. make a new PR plz