RDMA/hns: Don't unregister a callback we didn't register

The driver doesn't actually register an inetaddr notifier function,
so there is no need to unregister it on shutdown.

Signed-off-by: Lijun Ou <oulijun@huawei.com>
Signed-off-by: Wei Hu (Xavier) <xavier.huwei@huawei.com>
Signed-off-by: Shaobo Xu <xushaobo2@huawei.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

drivers/infiniband/hw/hns/hns_roce_device.h

@@ -474,7 +474,6 @@ struct hns_roce_ib_iboe {
 	spinlock_t		lock;
 	struct net_device      *netdevs[HNS_ROCE_MAX_PORTS];
 	struct notifier_block	nb;
-	struct notifier_block	nb_inet;
 	u8			phy_port[HNS_ROCE_MAX_PORTS];
 };
 

drivers/infiniband/hw/hns/hns_roce_main.c

@@ -424,7 +424,6 @@ static void hns_roce_unregister_device(struct hns_roce_dev *hr_dev)
 {
 	struct hns_roce_ib_iboe *iboe = &hr_dev->iboe;
 
-	unregister_inetaddr_notifier(&iboe->nb_inet);
 	unregister_netdevice_notifier(&iboe->nb);
 	ib_unregister_device(&hr_dev->ib_dev);
 }