if_awg fixes

[Ian Lepore]

On Thu, 2017-09-28 at 03:11 +0200, Kurt Jaeger wrote:
> Hi!
> 
> > 
> > I had issues with if_awg when passing heavy traffic
> > (transmission, samba, ...)
> [...]
> > 
> > Comparing the driver against if_nfe which also uses a ring buffer,
> > there are several issues with how the rings are programmed.
> > I made changes inspired by it.
> > 
> > The following fixes improved the card behavior on my boards.
> > (tested on Orange Pi PC and Orange Pi One)
> Will you submit your patches via https://bugs.freebsd.org ?
> 
> Otherwise it's difficult to keep track...
> 

Or as one or more reviews on phabricator, if you're already signed up
there.  https://reviews.freebsd.org/differential/

-- Ian