iplink: bridge_slave: export read-only values

Export all the read-only values that get returned about a bridge port
such as the timers, the ids, designated_port and cost,
topology_change_ack and config_pending. For the bridge ids the
br_dump_bridge_id function is exported from iplink_bridge.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
3 files changed