[S] Change in coreboot[master]: mb/amd/birman/port_descriptors_phoenix.c: Disable ASPM

[Fred Reitberger (Code Review)]

Attention is currently required from: Felix Held, Jason Glenesk, Martin Roth, Paul Menzel.

Fred Reitberger has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/74970?usp=email )

Change subject: mb/amd/birman/port_descriptors_phoenix.c: Disable ASPM
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Patch Set 2:

(1 comment)

Commit Message:

https://review.coreboot.org/c/coreboot/+/74970/comment/2a225c8c_0e4f882c :
PS1, Line 10:
> Fred, you wrote you set it WIP while this is investigated. […]

I have not found the cause yet.  Once the root cause has been found and fixed, this patch will likely be reverted but until then the reduction in kernel error logs is quite significant and aids in debugging other issues.