Describe the bug

In #96095, I noticed that when including zephyr/net/lldp.h, you
need prior zephyr/net/net_pkt.h otherwise you get a warning at build.

If zephyr/net/lldp.h needs zephyr/net/net_pkt.h, it should include it directly

Regression

• This is a regression.

Steps to reproduce

No response

Relevant log output

Impact

Annoyance – Minor irritation; no significant impact on usability or functionality.

Environment

No response

Additional Context

No response