net/mlx5: DR, Fix memory leak in modify action destroy

The rewrite data was no freed.

Fixes: 9db810ed ("net/mlx5: DR, Expose steering action functionality")
Signed-off-by: Alex Vesker <valex@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

drivers/net/ethernet/mellanox/mlx5/core/steering/dr_action.c

@@ -1577,6 +1577,7 @@ int mlx5dr_action_destroy(struct mlx5dr_action *action)
 		break;
 	case DR_ACTION_TYP_MODIFY_HDR:
 		mlx5dr_icm_free_chunk(action->rewrite.chunk);
+		kfree(action->rewrite.data);
 		refcount_dec(&action->rewrite.dmn->refcount);
 		break;
 	default: