Merge branch 'net-phy-eee-2'

Heiner Kallweit says:

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net: phy: add support for the EEE 2 registers

This series adds support for the EEE 2 registers. Most relevant and
for now the only supported modes are 2500baseT and 5000baseT.
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Signed-off-by: David S. Miller <davem@davemloft.net>