[S] Change in coreboot[master]: mb/google/myst: Store XHCI PCI resources

[Jon Murphy (Code Review)]

Attention is currently required from: Raul Rangel, Tim Van Patten, Karthik Ramasubramanian, Mark Hasemeyer.

Jon Murphy has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/74281 )

Change subject: mb/google/myst: Store XHCI PCI resources
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Patch Set 7:

(1 comment)

Commit Message:

https://review.coreboot.org/c/coreboot/+/74281/comment/c5b8a4ea_ab867e80 
PS5, Line 14: TEST=builds
> How do we track going back and verifying these types of CLs are working correctly? […]

Agree, it should be a part of the bringup worksheet.  https://docs.google.com/spreadsheets/d/1gxAgJB6V-Zq81dAfYKDKP3lI5FTYUqiK/edi...  There is some back and forth on which sheet we'll use, but we should ensure that all of this functionality is working as expected.