This updates a warning message that the bonding driver issues
when some modes are unable to determine the link speed of a slave
device.  The old message led users to believe that bonding was slowing
their gigabit devices to 100 Mb/sec.
Signed-off-by: Jay Vosburgh <fubar@us.ibm.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>