debugnet: remove spurious message on boot

[franco_opnsense.org]

Summary

In 2019 it was said to be added to fix the drivers but that has not
happened so it does not make sense to present a non-error to users.

No response on recent mailing list question:

https://lists.freebsd.org/archives/freebsd-net/2022-February/001254.html

[emaste]

I think it's important to leave this sort of message in for kernel developers to see, but agreed it has little user-facing value. What about something like this:

#ifndef INVARIANTS
if (bootverbose)
#endif
	printf("%s: Bad dn_init result from %s (ifp %p), ignoring.\n",
	    __func__, if_name(ifp), ifp);

i.e., always print it in an INVARIANTS kernel, otherwise hide it under bootverbose

[cem]

Either way seems fine to me. I’d ask vangyzen or bdrewery for input.

[franco_opnsense.org]

update as mentioned

[franco_opnsense.org]

Since I don't have a commit bit... anyone willing to commit this? Thanks in advance.