Hi Nico,
here is a follow. I somehow missed that when reviewing your commit... https://review.coreboot.org/#/c/20918/
@Jo here is my image. I've enabled usb debug for output, which consumes a lot boot time. So better compile coreboot another time on your own.
https://own.fe80.eu/s/OzAMekv0TpRGsFj
Best, lynxis