Author: Shuotian Cheng <stcheng_89(a)hotmail.com>
Date: 2017-04-11 (Tue, 11 Apr 2017)
libteam: Add team_get_port_enabled function
This function corresponds to team_set_port_enabled.
With this function, it is able to get the enabled state for port
identified by port_ifindex.
Signed-off-by: Shuotian Cheng <stcheng_89(a)hotmail.com>
Signed-off-by: Jiri Pirko <jiri(a)mellanox.com>