Merge branch 'bridge-vxlan-vni-filtering' into next

Roopa Prabhu  says:

====================

This series adds bridge command to manage
recently added vnifilter on a collect metadata
vxlan (external) device. Also includes per vni stats
support.

examples:
$bridge vni add dev vxlan0 vni 400

$bridge vni add dev vxlan0 vni 200 group 239.1.1.101

$bridge vni del dev vxlan0 vni 400

$bridge vni show

$bridge -s vni show

====================

Signed-off-by: David Ahern <dsahern@kernel.org>