Both of the aforementioned macros have been present in FreeBSD
for well over a decade: 2009 for KOBJMETHOD_END; 2011 for
DEVMETHOD_END.
Adapt all hardcoded references of {0, 0} with DEVMETHOD_END
and KOBJMETHOD_END as appropriate. This helps ensure that
future adaptations to drivers following patterns documented
in driver(9) can be made more easily/without issue.
MFC after: 1 week