net/mlx5: E-Switch, notify SD on eswitch disable

When eswitch is disabled, notify the SD layer so it can clean up
SD-specific resources such as the TX flow table root configuration
on secondary devices.

Signed-off-by: Shay Drory <shayd@nvidia.com>
Reviewed-by: Mark Bloch <mbloch@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://patch.msgid.link/20260612113904.537595-9-tariqt@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/mellanox/mlx5/core/eswitch.c

@@ -2065,6 +2065,7 @@ void mlx5_eswitch_disable(struct mlx5_eswitch *esw)
 	mlx5_esw_reps_unblock(esw);
 
 	esw->mode = MLX5_ESWITCH_LEGACY;
+	mlx5_sd_eswitch_mode_set(esw->dev, MLX5_ESWITCH_LEGACY);
 	mlx5_lag_enable_change(esw->dev);
 }