Merge branch 'phy_ksettings'

Merge branch 'phy_ksettings'

Philippe Reynes says:

====================
net: phy: add phy_ethtool_{get|set}_link_ksettings

Ethtool callbacks {get|set}_link_ksettings may be the
same for many drivers. So we add two generics callbacks
phy_ethtool_{get|set}_link_ksettings.

To use those generics callbacks, the ethernet driver must
use the pointer phydev contained in struct net_device, and
not use a private structure to store this pointer.

Changelog:
v3:
- rename function to phy_ethtool_{get|set}_link_ksettings
- move code to net/phy/phy.c
  This feedback were provided by David Decotigny
v2:
- use generic function instead of macro
- ethernet driver use the pointer phydev provided by struct net_device
  Those idea were provided by Ben Hutchings,
  and Florian Fainelli acknowledge them.
====================

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