[coreboot] Enable non-NVME devices in M.2 slot?

[Rafael Send]

Hi,
I know a couple folks here are active on Thinkpads.com / familiar with the
X210 port by Matthew.

The stock BIOS doesn't appear to support non-NVME devices in the M.2 slot;
I'm attempting to get a Sunix UPD2018 card working to add USB-C.

With stock BIOS, the card works just fine in the WiFi slot, and an NVME
drive works just fine in the M.2 slot so nothing appears physically broken.

However, so far nothing I've done lets me detect the Sunix card if I try to
put it in the NVME slot using this adapter
https://www.adt.link/product/R42.html. I would think it should just show
up under "lspci" like it does in the WiFi slot, but it does not.

I have not tried the latest Coreboot / port yet, but I figured I might as
well get some opinions on the subject.

What do you guys think, can this be done with Coreboot?

Cheers,
Rafael