[S] Change in coreboot[master]: soc/amd/cezanne: Enable XHCI wake event logging

[Martin Roth (Code Review)]

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

Martin Roth has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/67939 )

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

(2 comments)

File src/soc/amd/cezanne/Kconfig:

https://review.coreboot.org/c/coreboot/+/67939/comment/f13f54d5_c986bba0 
PS7, Line 37: 	select SMM_PCI_BAR_STORE
same comment as MDN - I think this should go in the amd common xhci instead of here, especially since it really depends on whether or not ELOG is enabled, which is a mainboard decision.

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

https://review.coreboot.org/c/coreboot/+/67939/comment/4d919d9b_017d1ade 
PS7, Line 6: 
Again, same as MDN, can we put this into a header file that gets included by the common code and get rid of this file from the SoC specific code?

Then we don't need it in the SOC makefile either.