With r232015, sf(4) gets correct speed/duplex of established link. Add more strict speed check in sf_miibus_statchg() and do not touch MAC config registers when driver lost a link.
With r232015, sf(4) gets correct speed/duplex of established link.
Add more strict speed check in sf_miibus_statchg() and do not touch
MAC config registers when driver lost a link.

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