Ethtool: Add Altera Triple Speed Ethernet Support

This patch adds Altera Triple Speed Ethernet support for dumping
formatted register output from Ethtool.

Signed-off-by: Vince Bridgers <vbridgers2013@gmail.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Release version 3.14.

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>