bridge: use dev->addr_assign_type to see if user change mac

And remove no longer used br->flags.

Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Acked-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

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

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

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