qemu: Alter error message when IOThread address not correct

Make the error a bit clearer that virtio-scsi IOThreads require
virtio pci or ccw controller address types.
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

src/qemu/qemu_domain.c

@@ -4784,8 +4784,8 @@ qemuDomainCheckSCSIControllerIOThreads(const virDomainControllerDef *controller,
     if (controller->info.type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI &&
         controller->info.type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_CCW) {
        virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
-                       _("IOThreads only available for virtio pci and "
-                         "virtio ccw controllers"));
+                       _("virtio-scsi IOThreads only available for virtio "
+                         "pci and virtio ccw controllers"));
        return false;
     }