RDMA/hns: Fix missing dealloc_dfx_cnt() during device unregister

driver inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I7PDHP

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The function hns_roce_dealloc_dfx_cnt() was omitted while
uploading "RDMA/hns: Add dfx cnt stats".

This patch fixes it.

Fixes: d5a4ca75 ("RDMA/hns: Add dfx cnt stats")
Signed-off-by: NChengchang Tang <tangchengchang@huawei.com>

drivers/infiniband/hw/hns/hns_roce_main.c

@@ -1500,6 +1500,7 @@ void hns_roce_exit(struct hns_roce_dev *hr_dev, bool bond_cleanup)
 	hns_roce_cmd_cleanup(hr_dev);
 	if (hr_dev->hw->cmq_exit)
 		hr_dev->hw->cmq_exit(hr_dev);
+	hns_roce_dealloc_dfx_cnt(hr_dev);
 }
 
 MODULE_LICENSE("Dual BSD/GPL");