Merge branch 'tg3_eee'

Nithin Nayak Sujir says:

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This series adds support for modifying EEE settings via ethtool. Since this can
impact Link Flap Avoidance, the driver pulls the current hardware settings if
LFA is enabled. This is similar to how we do the link settings to avoid a flap.

v2: Fixes pointed out by Ben Hutchings.
 - Use MDIO_AN_EEE_LPABLE to set the lp_advertised field.
 - Check that tx_lpi_timer is within valid range.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>