IB: remove in-kernel support for memory windows

Remove the unused ib_allow_mw and ib_bind_mw functions, remove the
unused IB_WR_BIND_MW and IB_WC_BIND_MW opcodes and move ib_dealloc_mw
into the uverbs module.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagig@mellanox.com>
Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com> [core]
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

drivers/infiniband/hw/mlx5/cq.c

@@ -154,9 +154,6 @@ static void handle_good_req(struct ib_wc *wc, struct mlx5_cqe64 *cqe,
 		wc->opcode    = IB_WC_MASKED_FETCH_ADD;
 		wc->byte_len  = 8;
 		break;
-	case MLX5_OPCODE_BIND_MW:
-		wc->opcode    = IB_WC_BIND_MW;
-		break;
 	case MLX5_OPCODE_UMR:
 		wc->opcode = get_umr_comp(wq, idx);
 		break;