add additionalNetworks in NetworkConfig

apiVersion: "networkoperator.openshift.io/v1"
kind: "NetworkConfig"
metadata:
  name: "default"
spec:
  serviceNetwork: "172.30.0.0/16"
  clusterNetworks:
    - cidr: "10.128.0.0/14"
      hostSubnetLength: 9
  defaultNetwork:
    type: OpenShiftSDN
    openshiftSDNConfig:
      mode: NetworkPolicy
  additionalNetworks:
    - type: Raw 
      name: macvlan-net
      rawCNIConfig: '{
        "type": "macvlan",
        "name": "macvlan-network",
        "master": "eth0",
        "ipam": {
                "type": "host-local",
                "subnet": "10.56.217.0/24",
                "routes": [{
                        "dst": "0.0.0.0/0"
                }],
                "gateway": "10.56.217.1"
        }
      }'