Because the comments in function cmd_add_bonding_slave_parsed() and
cmd_remove_bonding_slave_parsed() is 'Set the primary slave for
a bonded device',so fix it with 'add the slave for a bonded device'
and 'remove the slave from a bonded device'.
Signed-off-by: RongQiang Xie <xie.rongqiang@zte.com.cn>
Acked-by: Jingjing Wu <jingjing.wu@intel.com>