[M] Change in coreboot[master]: soc/amd/mendocino: Enable XHCI wake event logging

[Martin Roth (Code Review)]

Attention is currently required from: Robert Zieba, Jason Glenesk, Raul Rangel, Matt DeVillier, Angel Pons, Fred Reitberger, Karthik Ramasubramanian, Felix Held.

Martin Roth has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/67938 )

Change subject: soc/amd/mendocino: Enable XHCI wake event logging
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Patch Set 7:

(1 comment)

File src/soc/amd/mendocino/xhci_elog.c:

https://review.coreboot.org/c/coreboot/+/67938/comment/5dca01d1_317a066e 
PS7, Line 6: 
Does this need to be a struct that's defined in a C file?  The preference for these sorts of things is for each platform to use a header file with definitions that gets included by a C file in the common directory.

Then the function below can go into common code as well.