RDMA/hns: Delete useful prints for aeq subtype event

Current all messages printed for aeq subtype event are wrong.  Thus,
delete them and only the value of subtype event is printed.

Signed-off-by: Yixian Liu <liuyixian@huawei.com>
Signed-off-by: Lijun Ou <oulijun@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>