[S] Change in coreboot[master]: mb/google/guybrush: Store XHCI BARs

[Robert Zieba (Code Review)]

Attention is currently required from: Jason Nien, Martin Roth, Karthik Ramasubramanian.

Hello build bot (Jenkins), Jason Nien, Martin Roth, Karthik Ramasubramanian,

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/68326

to look at the new patch set (#5).

Change subject: mb/google/guybrush: Store XHCI BARs
......................................................................

mb/google/guybrush: Store XHCI BARs

This commit implements `smm_mainboard_pci_bar_store_init` to store the
BARs for XHCI devices. These stored BARs are later used by the elog code
to log XHCI wake events.

Example elog contents:
```
250 | 2022-10-11 16:04:49 | S0ix Enter
251 | 2022-10-11 16:04:53 | S0ix Exit
252 | 2022-10-11 16:04:53 | Wake Source | GPE # | 31
253 | 2022-10-11 16:04:53 | Wake Source | PME - XHCI (USB 2.0 port) | 1
254 | 2022-10-11 16:05:24 | S0ix Enter
255 | 2022-10-11 16:05:27 | S0ix Exit
256 | 2022-10-11 16:05:27 | Wake Source | GPE # | 31
257 | 2022-10-11 16:05:27 | Wake Source | PME - XHCI (USB 2.0 port) | 257
```

BRANCH=guybrush
BUG=b:186792595
TEST=Ran on nipperkin, verified that XHCI wake events show up in elog

Change-Id: I1d0911df9e3102791bf7b5723ac38e2ba82a9db6
Signed-off-by: Robert Zieba 
---
M src/mainboard/google/guybrush/mainboard.c
1 file changed, 47 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/26/68326/5