selftests: bpf: fix legacy netfilter options

Recent commit to add NETFILTER_XTABLES_LEGACY missed setting
a couple of configs to y. They are still enabled but as modules
which appears to have upset BPF CI, e.g.:

   test_bpf_nf_ct:FAIL:iptables-legacy -t raw -A PREROUTING -j CONNMARK --set-mark 42/0 unexpected error: 768 (errno 0)

Fixes: 3c3ab65 ("selftests: net: Enable legacy netfilter legacy options.")
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

Author: kuba-moo

tools/testing/selftests/bpf/config

@@ -97,6 +97,8 @@ CONFIG_NF_TABLES_NETDEV=y
 CONFIG_NF_TABLES_IPV4=y
 CONFIG_NF_TABLES_IPV6=y
 CONFIG_NETFILTER_INGRESS=y
+CONFIG_IP_NF_IPTABLES_LEGACY=y
+CONFIG_IP6_NF_IPTABLES_LEGACY=y
 CONFIG_NETFILTER_XTABLES_LEGACY=y
 CONFIG_NF_FLOW_TABLE=y
 CONFIG_NF_FLOW_TABLE_INET=y