IB/mlx4: Remove old FRWR API support

No ULP uses it anymore, go ahead and remove it.

Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Acked-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Doug Ledford <dledford@redhat.com>

drivers/infiniband/hw/mlx4/cq.c

@@ -818,8 +818,7 @@ repoll:
 			wc->opcode    = IB_WC_LSO;
 			break;
 		case MLX4_OPCODE_FMR:
-			wc->opcode    = IB_WC_FAST_REG_MR;
-			/* TODO: wc->opcode    = IB_WC_REG_MR; */
+			wc->opcode    = IB_WC_REG_MR;
 			break;
 		case MLX4_OPCODE_LOCAL_INVAL:
 			wc->opcode    = IB_WC_LOCAL_INV;