Merge branch 'locked-version-of-netdev_notify_peers'

Lijun Pan says:

====================
add a locked version of netdev_notify_peers

This series introduce the lockless version of netdev_notify_peers
and then apply it to the relevant drivers.

In v1, a more appropriate name __netdev_notify_peers is used;
netdev_notify_peers is converted to call the new helper.
In v2, patch 3 calls the new helper where notify variable used
to be set true.
====================

Link: https://lore.kernel.org/r/20201214211930.80778-1-ljp@linux.ibm.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>