metropolis/node/core/network: replace magic number with constant

Closes #418

Change-Id: Ia93f2fbc4c7fe9d9f9ada768610e28e7044f1fa2
Reviewed-on: https://review.monogon.dev/c/monogon/+/4353
Tested-by: Jenkins CI
Reviewed-by: Leopold Schabel <leo@monogon.tech>
diff --git a/metropolis/node/core/network/static.go b/metropolis/node/core/network/static.go
index 27c952a..43eef08 100644
--- a/metropolis/node/core/network/static.go
+++ b/metropolis/node/core/network/static.go
@@ -341,8 +341,7 @@
 	netpb.Bond_TRANSMIT_HASH_POLICY_LAYER3_4:       netlink.BOND_XMIT_HASH_POLICY_LAYER3_4,
 	netpb.Bond_TRANSMIT_HASH_POLICY_ENCAP_LAYER2_3: netlink.BOND_XMIT_HASH_POLICY_ENCAP2_3,
 	netpb.Bond_TRANSMIT_HASH_POLICY_ENCAP_LAYER3_4: netlink.BOND_XMIT_HASH_POLICY_ENCAP3_4,
-	// TODO(vishvananda/netlink#860): constant not in netlink yet
-	netpb.Bond_TRANSMIT_HASH_POLICY_VLAN_SRCMAC: 5,
+	netpb.Bond_TRANSMIT_HASH_POLICY_VLAN_SRCMAC:    netlink.BOND_XMIT_HASH_POLICY_VLAN_SRCMAC,
 }
 
 func bondIfaceFromSpec(it *netpb.Interface_Bond, i *netpb.Interface) (*netlink.Bond, error) {