net/mlx5: FWTrace, Reduce stack usage

Mark mlx5_tracer_print_trace as noinline as the function only uses 512
bytes on the stack to avoid the following build warning:

drivers/net/ethernet/mellanox/mlx5/core/diag/fw_tracer.c:660:13: error: stack frame size of 1032 bytes in function 'mlx5_fw_tracer_handle_traces' [-Werror,-Wframe-larger-than=]

Fixes: 70dd6fd ("net/mlx5: FW tracer, parse traces and kernel tracing support")
Reported-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

drivers/net/ethernet/mellanox/mlx5/core/diag/fw_tracer.c

@@ -553,9 +553,10 @@ static void mlx5_fw_tracer_save_trace(struct mlx5_fw_tracer *tracer,
 	mutex_unlock(&tracer->st_arr.lock);
 }
 
-static void mlx5_tracer_print_trace(struct tracer_string_format *str_frmt,
-				    struct mlx5_core_dev *dev,
-				    u64 trace_timestamp)
+static noinline
+void mlx5_tracer_print_trace(struct tracer_string_format *str_frmt,
+			     struct mlx5_core_dev *dev,
+			     u64 trace_timestamp)
 {
 	char	tmp[512];