[Bug 201885] acpi PNP0C14:02: duplicate WMI GUID 05901221-D566-11D1-B2F0-00A0C9062910 (first instance was on PNP0C14:01)

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https://bugzilla.kernel.org/show_bug.cgi?id=201885

--- Comment #20 from Mario Limonciello (AMD) (mario.limonciello@xxxxxxx) ---
During the architectural design of the WMI subsystem an assumption was made
that there was a 1:1 mapping of WMI GUIDs (that is they're unique).  This
hasn't caused MAJOR functional problems, but this was proven wrong, as it's
possible to fetch multiple BMOFs.

This change makes it so that if you have the wmi-bmof driver loaded on your
system you'll be able to fetch all of the BMOFs.  If you look in
/sys/bus/wmi/devices, you should see more entries with this patch in place.

If the same GUID is used multiple times on a system for any reason beside
wmi-bmof, that driver may need to be changed too.

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