qemu: do not add model when actual iface type is hostdev

No default model should be added to the interface
entry at post parse when its actual network type is hostdev
as doing so might cause a mismatch between the interface
definition and its actual device type.
Signed-off-by: NPaulo de Rezende Pinatti <ppinatti@linux.ibm.com>
Reviewed-by: NLaine Stump <laine@redhat.com>

src/qemu/qemu_domain.c

@@ -5831,6 +5831,7 @@ qemuDomainDeviceNetDefPostParse(virDomainNetDefPtr net,
                                 virQEMUCapsPtr qemuCaps)
 {
     if (net->type != VIR_DOMAIN_NET_TYPE_HOSTDEV &&
+        virDomainNetResolveActualType(net) != VIR_DOMAIN_NET_TYPE_HOSTDEV &&
         !virDomainNetGetModelString(net))
         net->model = qemuDomainDefaultNetModel(def, qemuCaps);