qemu-options.hx: Document the virtio-iommu-pci granule option

We are missing an entry for the virtio-iommu-pci device. Add the
information on which machine it is currently supported and document
the new granule option.

Signed-off-by: Eric Auger <eric.auger@redhat.com>

Message-Id: <20240307134445.92296-5-eric.auger@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
1 file changed