KR260 support is missing

[pcotret]

https://www.amd.com/en/products/system-on-modules/kria/k26/kr260-robotics-starter-kit.html

I'm currently working with this board which is based on a Ultrascale+ device.

I'll try to push an initial support in the next few days during my summer break ;)

[enjoy-digital]

Nice @pcotret, thanks for sharing.