vfio/pci: Also demote hiding standard cap messages

Apply the same logic as commit 912b625b ("vfio/pci: demote hiding
ecap messages to debug level") for the less common case of hiding
standard capabilities.

Reviewed-by: Oleksandr Natalenko <oleksandr@natalenko.name>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Link: https://lore.kernel.org/r/20230523225250.1215911-1-alex.williamson@redhat.com


Signed-off-by: Alex Williamson <alex.williamson@redhat.com>