Merge branch 'marvell-phy-refactor-and-cleanup'

Andrew Lunn says:

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More Marvell PHY refactoring and cleanup

Consolidate more duplicated code into helpers, make use of core
helpers, move code into a helper for later adding functionality to add
marvell PHYs, etc.
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Signed-off-by: David S. Miller <davem@davemloft.net>