batman-adv: protect neighbor nodes with reference counters

Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>

diff --cc net/batman-adv/originator.c
Simple merge

diff --cc net/batman-adv/originator.h
Simple merge

diff --cc net/batman-adv/routing.c
Simple merge

diff --cc net/batman-adv/types.h
Simple merge