[L] Change in coreboot[main]: mb/dell: Add OptiPlex 7020/9020 port

[Ben Westover (Code Review)]

Attention is currently required from: Máté Kukri, nat ✨.

Ben Westover has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/55232?usp=email )

Change subject: mb/dell: Add OptiPlex 7020/9020 port
......................................................................

Patch Set 31:

(1 comment)

Patchset:

PS31:
> You have to short the service jumper near PCIe and then boot with iomem=relaxed

Yes, this is what I get with a jumper on the SERVICE_MODE header. It's the same result with or without the jumper (always booted with iomem=relaxed). Both in the original BIOS and in Coreboot. Service mode is definitely being enabled when I have that jumper set because the original BIOS gives me a warning about it on boot.