RDMA/mlx5: Remove unneeded semicolon

A semicolon is not needed after a switch statement.

Link: https://lore.kernel.org/r/20201031134638.2135060-1-trix@redhat.comSigned-off-by: Tom Rix <trix@redhat.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

drivers/infiniband/hw/mlx5/qp.c

@@ -3078,7 +3078,7 @@ static int ib_to_mlx5_rate_map(u8 rate)
 		return 5;
 	default:
 		return rate + MLX5_STAT_RATE_OFFSET;
-	};
+	}
 
 	return 0;
 }