vfio/pci: Pass an error object to vfio_intx_enable
Pass an error object to prepare for migration to VFIO-PCI realize.
The error object is propagated down to vfio_intx_enable_kvm().
The three other callers, vfio_intx_enable_kvm(), vfio_msi_disable_common()
and vfio_pci_post_reset() do not propagate the error and simply call
error_reportf_err() with the ERR_PREFIX formatting.
Signed-off-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>