RDMA/hns: Use delay instead of usleep

In order to avoid using usleep function in lock function, we use delay
function instead of it.  Besides, it also use brackets for standardized
the computed order.

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

drivers/infiniband/hw/hns/hns_roce_hem.c

@@ -170,7 +170,7 @@ int hns_roce_calc_hem_mhop(struct hns_roce_dev *hr_dev,
 	case 3:
 		mhop->l2_idx = table_idx & (chunk_ba_num - 1);
 		mhop->l1_idx = table_idx / chunk_ba_num & (chunk_ba_num - 1);
-		mhop->l0_idx = table_idx / chunk_ba_num / chunk_ba_num;
+		mhop->l0_idx = (table_idx / chunk_ba_num) / chunk_ba_num;
 		break;
 	case 2:
 		mhop->l1_idx = table_idx & (chunk_ba_num - 1);
@@ -342,7 +342,7 @@ static int hns_roce_set_hem(struct hns_roce_dev *hr_dev,
 			} else {
 				break;
 			}
-			msleep(HW_SYNC_SLEEP_TIME_INTERVAL);
+			mdelay(HW_SYNC_SLEEP_TIME_INTERVAL);
 		}
 
 		bt_cmd_l = (u32)bt_ba;