[NETFILTER]: Fix incorrect dependency for IP6_NF_TARGET_NFQUEUE

IP6_NF_TARGET_NFQUEUE depends on IP6_NF_IPTABLES, not IP_NF_IPTABLES.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>