Do not configure ARP for custom interface without IP
Do not configure ARP for custom interface without IP

Signed-off-by: Milan Lenco <fd44239370131ad5b8cae55d5f197286407fee30@pantheon.tech>

rastislavszabo/vpp,brecode/vpp,brecode/vpp,rastislavszabo/vpp,brecode/vpp,rastislavszabo/vpp,brecode/vpp,rastislavszabo/vpp,brecode/vpp,rastislavszabo/vpp,rastislavszabo/vpp,rastislavszabo/vpp