Merge branch 'net-remove-rtmsg_ifinfo-used-in-bridge-and-bonding'

Xin Long says:

====================
net: remove rtmsg_ifinfo used in bridge and bonding

It's better to send notifications to userspace by the events in
rtnetlink_event, instead of calling rtmsg_ifinfo directly.

This patcheset is to remove rtmsg_ifinfo called in bonding and
bridge, the notifications can be handled by NETDEV_CHANGEUPPER
and NETDEV_CHANGELOWERSTATE events in rtnetlink_event.

It could also fix some redundant notifications from bonding and
bridge.

v1->v2:
  - post to net-next.git instead of net.git, for it's more like an
    improvement for bonding
v2->v3:
  - add patch 1/4 to remove rtmsg_ifinfo called in add_del_if
====================

Signed-off-by: David S. Miller <davem@davemloft.net>