bridge: vni: add support for stats dumping

Add support for "-s" option which causes bridge vni to dump per-vni
statistics. Note that it disables vni range compression.

Example:
$ bridge -s vni | more
 dev               vni              group/remote
 vxlan0             1024  239.1.1.1
                     RX: bytes 0 pkts 0 drops 0 errors 0
                     TX: bytes 0 pkts 0 drops 0 errors 0
                    1025  239.1.1.1
                     RX: bytes 0 pkts 0 drops 0 errors 0
                     TX: bytes 0 pkts 0 drops 0 errors 0

Signed-off-by: Nikolay Aleksandrov <nikolay@nvidia.com>
Signed-off-by: Roopa Prabhu <roopa@nvidia.com>
Signed-off-by: David Ahern <dsahern@kernel.org>
3 files changed