net/mlx5: E-Switch, Return EBUSY if can't get mode lock

It is to avoid tc retrying during device mode change.
Signed-off-by: Jianbo Liu <jianbol@nvidia.com>
Reviewed-by: Roi Dayan <roid@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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

@@ -4463,7 +4463,7 @@ int mlx5e_configure_flower(struct net_device *dev, struct mlx5e_priv *priv,
 	int err = 0;
 
 	if (!mlx5_esw_hold(priv->mdev))
-		return -EAGAIN;
+		return -EBUSY;
 
 	mlx5_esw_get(priv->mdev);