batman-adv: tvlv - convert roaming adv packet to use tvlv unicast packets

Instead of generating roaming specific packets the TVLV unicast API is
used to send roaming information.

Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>

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

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

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

diff --cc net/batman-adv/translation-table.c
Simple merge