batman-adv: refactoring API: find generalized name for bat_ogm_init callback

Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
Signed-off-by: Antonio Quartulli <ordex@autistici.org>

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

diff --cc net/batman-adv/hard-interface.c
Simple merge

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

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