Merge branch 'bgmac-cleanups-PM-support'

Jon Mason says:

====================
net: ethernet: bgmac: PM support and clean-ups

Changes in v3:
* Corrected a bug Florian found and added his Reviewed-by

Changes in v2:
* Reworked the PM patch with Florian's suggestions

Add code to support Power Management (only tested on NS2), and add some
code clean-ups
====================

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