IB/hfi1: Fix fall-through warnings for Clang

In preparation to enable -Wimplicit-fallthrough for Clang, fix multiple
warnings by explicitly adding multiple break statements instead of just
letting the code fall through to the next case.

Link: https://lore.kernel.org/r/13cc2fe2cf8a71a778dbb3d996b07f5e5d04fd40.1605896059.git.gustavoars@kernel.org
Link: https://github.com/KSPP/linux/issues/115Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Tested-by: Mike Marciniszyn <mike.marciniszyn@cornelisnetworks.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

drivers/infiniband/hw/hfi1/qp.c

@@ -339,6 +339,7 @@ int hfi1_setup_wqe(struct rvt_qp *qp, struct rvt_swqe *wqe, bool *call_send)
 			return -EINVAL;
 		if (ibp->sl_to_sc[rdma_ah_get_sl(&ah->attr)] == 0xf)
 			return -EINVAL;
+		break;
 	default:
 		break;
 	}

drivers/infiniband/hw/hfi1/tid_rdma.c

@@ -2826,6 +2826,7 @@ static bool handle_read_kdeth_eflags(struct hfi1_ctxtdata *rcd,
 		default:
 			break;
 		}
+		break;
 	default:
 		break;
 	}
@@ -3005,6 +3006,7 @@ bool hfi1_handle_kdeth_eflags(struct hfi1_ctxtdata *rcd,
 		default:
 			break;
 		}
+		break;
 	default:
 		break;
 	}
@@ -3221,6 +3223,7 @@ bool hfi1_tid_rdma_wqe_interlock(struct rvt_qp *qp, struct rvt_swqe *wqe)
 			req = wqe_to_tid_req(prev);
 			if (req->ack_seg != req->total_segs)
 				goto interlock;
+			break;
 		default:
 			break;
 		}
@@ -3239,9 +3242,11 @@ bool hfi1_tid_rdma_wqe_interlock(struct rvt_qp *qp, struct rvt_swqe *wqe)
 			req = wqe_to_tid_req(prev);
 			if (req->ack_seg != req->total_segs)
 				goto interlock;
+			break;
 		default:
 			break;
 		}
+		break;
 	default:
 		break;
 	}