RDMA/hns: Support dispatching IB event for RoCE bonding

driver inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I6ZAIM



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Support dispatching IB event for RoCE bonding. After setting bond,
IB_EVENT_PORT_ERR is dispatched in the following situation:
	1. bond0 becomes link down;
	2. all slaves become link down (as it will lead to a link-down
           of the upper device).

IB_EVENT_PORT_ACTIVE is dispatched in the following situation:
	1. bond0 becomes link up;
	2. one slave becomes link up when all slaves were link down (as
           it will lead to a link-up of the upper device).

Signed-off-by: Junxian Huang <huangjunxian6@hisilicon.com>