Merge branch 'net-phy-add-helpers-for-handling-C45-10GBT-AN-register-values'

Heiner Kallweit says:

====================
net: phy: add helpers for handling C45 10GBT AN register values

Similar to the existing helpers for the Clause 22 registers add helpers
to deal with converting Clause 45 advertisement registers to / from
link mode bitmaps.

Note that these helpers are defined in linux/mdio.h, not like the
Clause 22 helpers in linux/mii.h. Reason is that the Clause 45 register
constants are defined in uapi/linux/mdio.h. And uapi/linux/mdio.h
includes linux/mii.h before defining the C45 register constants.

v2:
- Remove few helpers which aren't used by this series. They will
  follow together with the users.
====================

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