All usage of this function was removed three years ago, and the
function was marked as deprecated:
a52ad514 ("net: deprecate eth_change_mtu, remove usage")
So I think we can remove it now.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>