qemu_domain: Add missing IOMMUFD cleanup

If starting VM fails we would leak the FD for IOMMU device.

Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>

src/qemu/qemu_domain.c

@@ -1975,6 +1975,8 @@ qemuDomainObjPrivateDataClear(qemuDomainObjPrivate *priv)
 
     priv->migrationRecoverSetup = false;
 
+    VIR_FORCE_CLOSE(priv->iommufd);
+
     g_clear_pointer(&priv->memoryBackingDir, g_free);
 }