bonding: fix verification of ns_ip6_target and arp_validate options
When arp_validate is set it requires ns_ip6_target or arp_ip_target options to be set.
Fixes: c6487c24 ('bonding: add support to ns_ip6_target option')
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When arp_validate is set it requires ns_ip6_target or arp_ip_target options to be set.
Fixes: c6487c24 ('bonding: add support to ns_ip6_target option')