Merge branch 'ethoc'

Max Filippov says:

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OpenCores 10/100 MAC ethtool operations

this series implements ethtool callbacks for the ethoc driver as was
requested by Florian.

Changes v1->v2:
- fix {get,set}_settings return code in case there's no PHY;
- fix set_ringparam: check ring sizes, change ring sizes on the fly.
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Signed-off-by: David S. Miller <davem@davemloft.net>