service/kube-proxy compatibility

[BSWANG]

Will the 'sriov' interface's package process by iptables? The kube-proxy default use iptables to load balance kubernetes service traffic.

[hustcat]

@BSWANG By default, the packets of VF will go to uplink directly, and will not go to host network stack, so host's iptables will not take effect to sriov VF.