Merge patch series "board: phytec: Update rm-cfgs, env and docs"

Wadim Egorov <w.egorov@phytec.de> says:

This is a small updates across all K3 based phytec SoMs.
Update docs, rm-cfg yaml files and drop rauc environment.

Link: https://lore.kernel.org/r/20260513071905.83522-1-w.egorov@phytec.de