Add Arduino Pro Portenta X8 to your supported board list

[Maisyyarden]

https://docs.arduino.cc/hardware/portenta-x8

• [ ] Development Platform or Board. All issues (building, uploading, adding new boards, etc.) related to PlatformIO development platforms should be reported to appropriate repository related to your hardware https://github.com/topics/platformio-platform

Thanks

[maxgerhardt]

There's a test project at https://github.com/maxgerhardt/pio-portentax8, could you check it out?