Fix bpf_sock compilation for ipv6-only

[alexferenets]

Otherwise, when started with --enable-ipv4=false --enable-ipv6=true I got

level=error msg="Failed to compile bpf_sock.o: exit status 1" compiler-pid=2393 subsys=datapath-loader
level=warning msg="/var/lib/cilium/bpf/bpf_sock.c:1094:10: error: implicit declaration of function '__sock4_health_fwd' [-Werror,-Wimplicit-function-declaration]" subsys=datapath-loader
level=warning msg="                return __sock4_health_fwd(ctx);" subsys=datapath-loader
level=warning msg="                       ^" subsys=datapath-loader
level=warning msg="/var/lib/cilium/bpf/bpf_sock.c:1094:10: note: did you mean '__sock6_health_fwd'?" subsys=datapath-loader
level=warning msg="/var/lib/cilium/bpf/bpf_sock.c:1086:1: note: '__sock6_health_fwd' declared here" subsys=datapath-loader
level=warning msg="__sock6_health_fwd(struct bpf_sock_addr *ctx __maybe_unused)" subsys=datapath-loader
level=warning msg=^ subsys=datapath-loader
level=warning msg="1 error generated." subsys=datapath-loader

[maintainer-s-little-helper]

Commit 946f9d3 does not match "(?m)^Signed-off-by:".

Please follow instructions provided in https://docs.cilium.io/en/stable/contributing/development/contributing_guide/#developer-s-certificate-of-origin

[maintainer-s-little-helper]

Commit 946f9d3 does not match "(?m)^Signed-off-by:".

Please follow instructions provided in https://docs.cilium.io/en/stable/contributing/development/contributing_guide/#developer-s-certificate-of-origin

[ti-mo]

@alexferenets Please add a release note to your PR description (you removed it for some reason).

    ```release-note
    Release note here
    ```

[YutaroHayakawa]

We need to fix a point Daniel mentioned, but otherwise, looks good to me.

[ti-mo]

@alexferenets Please address the comments, add a commit message (one that includes Signed-off-by as mentioned in the comment above) and remove the merge commit. Just rebasing onto main should take care of that.

[maintainer-s-little-helper]

Commits 946f9d3, 89d33c5 do not match "(?m)^Signed-off-by:".

Please follow instructions provided in https://docs.cilium.io/en/stable/contributing/development/contributing_guide/#developer-s-certificate-of-origin

[ldelossa]

/test

[ldelossa]

@alexferenets - checkpatch is reporting a lint which should be fixed before this is merged: https://github.com/cilium/cilium/actions/runs/8111595771/job/22180953056?pr=30553

[borkmann]

@alexferenets - checkpatch is reporting a lint which should be fixed before this is merged: https://github.com/cilium/cilium/actions/runs/8111595771/job/22180953056?pr=30553

Agree, needs proper indent. Otherwise lgtm.

[borkmann]

@alexferenets - checkpatch is reporting a lint which should be fixed before this is merged: https://github.com/cilium/cilium/actions/runs/8111595771/job/22180953056?pr=30553

Agree, needs proper indent. Otherwise lgtm.

@alexferenets could you update the indent to a tab? Otherwise its good to go.

[alexferenets]

@borkmann can we merge it now?

[julianwiedmann]

/test