[PATCH v3] net/virtio-user: fix eventfd sharing in secondary process

[Samar Yadav]

Hi Maxime, Stephen,

Gentle ping on this one. v2 addressed the rte_calloc() and
rte_thread_mutex_init_shared() feedback from the initial review, and
v3 cleaned up a few style items (include ordering, named constants)
flagged by the automated review. CI is green apart from the
automated review warning, which I've checked against the actual code
and don't believe blocks anything.

Let me know if there's anything else needed on my end.

Thanks,
Samar Yadav