Merge branch 'stmmac-next'

Jose Abreu says:

====================
net: stmmac: Improvements for -next

[ This is just a rebase of v2 into latest -next in order to avoid a merge
conflict ]

Couple of improvements for -next tree. More info in commit logs.
====================

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