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linuxkpi: Define `PCI_POSSIBLE_ERROR()` macro
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Authored by dumbbell on Sun, Jan 4, 10:17 AM.
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Details

Summary

It comes with PCI_ERROR_RESPONSE and PCI_SET_ERROR_RESPONSE() but we don't use them so far. Therefore PCI_POSSIBLE_ERROR() will always reture false.

As written in the comment, this macro is a bit weird given the Linux `pci_read_*() functions can return an error code separately from the read value.

The PCI_POSSIBLE_ERROR() macro started to be used by the amdgpu DRM driver in Linux 6.10.

This is part of the update of DRM drivers to Linux 6.10.

Sponsored by: The FreeBSD Foundation

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