Comment 66 for bug 1983180

This patch also disables CPPC support on a few of my relatively recent AMD Zen Desktop systems. The issue is that the ACPI _OSC method supports ONLY the UUID of the "PCI root bridge device", but not any other, but linux is looking for CPPC support with the "Platform-Wide OSPM Capabilities" uuid, which does not
exist anywhere in the firmware. bios engineers told me that this is all part of AMDs AGESA thingie, and they won't be able to add support for this, at least
on current (i.e. zen3-supporting) platforms.

Could this be worked around, by first checking whether any _CPC objects exist, and maybe a matching PCC entry?