Staging: batman-adv: use rcu callbacks when freeing batman_if

Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
Signed-off-by: Sven Eckelmann <sven.eckelmann@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

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

diff --cc drivers/staging/batman-adv/hard-interface.h
Simple merge

diff --cc drivers/staging/batman-adv/types.h
Simple merge