Draft: Fix some issue when building with eBPF support

Summary

This fixes some issues found when trying to build and use NM with eBPF support.

Purpose

eBPF support is used by ACD to filter ARP packets we are interested in, which means that the daemon doesn't have to be awakened when the packet is not related to our addresses. By enabling it, the operation becomes more efficient and NM will use less CPU in environment with many ARP requests.