parse-ip: it does not make any sense to configure 'loopback'

Signed-off-by: Mathieu Tortuyaux <mtortuyaux@microsoft.com>

Author: tormath1

dracut/50flatcar-network/parse-ip-for-networkd.sh

@@ -121,6 +121,7 @@ for p in $(getargs ip=); do
     mkdir -p /etc/systemd/network
     echo '[Match]' > $_net_file
     _dev=${dev:-"*"}; echo "Name=$_dev" >> $_net_file
+    echo "Type=!loopback" >> $_net_file
     echo '[Link]' >> $_net_file
     [ -n "$macaddr" ] && echo "MACAddress=$macaddr" >> $_net_file
     [ -n "$mtu" ] && echo "MTUBytes=$mtu" >> $_net_file