fix(boards): Select hummingbird physical layout

[nmunnich]

The physical layout was defined previously, but never selected in the chosen node. I did not verify the correctness of the physical layout and matrix transform.

[nmunnich]

I think if we're not explicit about it everywhere, then this needs to be documented. I'd prefer to be explicit everywhere to avoid needing to document it, but I'm also always biased towards "one way to do it".

[nmunnich]

Closing as it is part of #2582 and #2595.