Merge branch 'phy-helpers'

Merge branch 'phy-helpers'

Heiner Kallweit says:

====================
net: phy: add functionality to speed down PHY when waiting for WoL packet

Some network drivers include functionality to speed down the PHY when
suspending and just waiting for a WoL packet because this saves energy.

This patch is based on our recent discussion about factoring out this
functionality to phylib. First user will be the r8169 driver.

v2:
- add warning comment to phy_speed_down regarding usage of sync = false
- remove sync parameter from phy_speed_up
====================

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