dbparser: fix LLADDR parser

The LLADDR parser required that the exact number of components were
present and got the parts/count values backwards.

Reported-By: Evan Rempel <erempel@uvic.ca>
Signed-Off-By: Evan Rempel <erempel@uvic.ca>
Signed-off-by: Gergely Nagy <algernon@balabit.hu>