Hi, I found the same today when working on 21.11 This is caused by [1] removing the option quite a while ago. It was a no-op since then but now became fatal. It can just be removed, doing so in my 21.11 branch and from there we can then consider backports as/if needed.
[1]: https://github.com/DPDK/dpdk/commit/cba806e07d6f7e6cfa9749346f2dc75288f984f7 -- Christian Ehrhardt Staff Engineer, Ubuntu Server Canonical Ltd
