Add support for RP2040_DIY variant

[ponzano]

SOC

Other

Lora IC

sx1262

Product Link

https://github.com/paoloponzano/ponzy-meshtastic.git

Description

Hi, i'd like to contribute to the firmware adding the needed changes to support a DIY variant based on a RP2040 board. I currently built one using a VCC-GND RP2040, eByte E22-900M30S radio module and common oled display. It has run without problems since last month and power consumption is great too. It could be interesting to those wanting to build a cheap node. Bluetooth support is ot of my skills for now
(photo: https://media.discordapp.net/attachments/919642584480112750/1215576756937822219/camphoto_824023566.jpg?ex=65fd4113&is=65eacc13&hm=782217e6a89a2caf07acfcda50664c0fdfc9bf37f57f4addfbea66fe6c8c19f2&=&format=webp&width=895&height=671)

This might be useful for who wants to use the ebyte module with other boards too.