[BRIDGE]: Use rtnl registration interface

Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --cc net/bridge/br.c
Simple merge

diff --cc net/bridge/br_netlink.c
Simple merge

diff --cc net/bridge/br_private.h
Simple merge