RDMA/hns: Simplify attribute judgment code

Combine attribute flags before masking them.

Link: https://lore.kernel.org/r/1584674622-52773-4-git-send-email-liweihang@huawei.com
Signed-off-by: Lang Cheng <chenglang@huawei.com>
Signed-off-by: Weihang Li <liweihang@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

drivers/infiniband/hw/hns/hns_roce_hw_v2.c

@@ -4281,8 +4281,7 @@ static int modify_qp_rtr_to_rts(struct ib_qp *ibqp,
 	}
 
 	/* Not support alternate path and path migration */
-	if ((attr_mask & IB_QP_ALT_PATH) ||
-	    (attr_mask & IB_QP_PATH_MIG_STATE)) {
+	if (attr_mask & (IB_QP_ALT_PATH | IB_QP_PATH_MIG_STATE)) {
 		ibdev_err(ibdev, "RTR2RTS attr_mask (0x%x)error\n", attr_mask);
 		return -EINVAL;
 	}