[S] Change in coreboot[main]: mb/*: Drop xhci_overcurrent_map II

[Patrick Rudolph (Code Review)]

Attention is currently required from: Alexander Couzens, Keith Hui, Nicholas Chin.

Patrick Rudolph has posted comments on this change by Keith Hui. ( https://review.coreboot.org/c/coreboot/+/85924?usp=email )

Change subject: mb/*: Drop xhci_overcurrent_map II
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Patch Set 1: Code-Review-1

(1 comment)

Patchset:

PS1:
> I used t530 as an example and the USB OC config matches. […]

Apparently you broke it in https://review.coreboot.org/c/coreboot/+/81882/7
const struct southbridge_usb_port mainboard_usb_ports is now unused and usb_port_config is missing on those board listed here.

Please fix https://review.coreboot.org/c/coreboot/+/81882 first.