bonding: use ETH_MAX_MTU as max mtu

bonding: use ETH_MAX_MTU as max mtu

[ Upstream commit 31c05415f5b471fd333fe42629788364faea8e0d ]

This restores the ability of setting bond device's mtu to 9000.

Fixes: 91572088e3fd ("net: use core MTU range checking in core net infra")
Reported-by: daznis@gmail.com
Reported-by: Brad Campbell <lists2009@fnarfbargle.com>
Cc: Jarod Wilson <jarod@redhat.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: Jay Vosburgh <jay.vosburgh@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>