iplink: bond_slave: add support for actor_port_prio

Add support for the actor_port_prio option for bond slaves.
This per-port priority can be used by the bonding driver in ad_select to
choose the higher-priority aggregator during failover.

Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Signed-off-by: David Ahern <dsahern@kernel.org>
3 files changed