Merge branch 'phy-add-helpers-for-setting-clearing-bits-in-PHY-registers'

Heiner Kallweit says:

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phy: add helpers for setting/clearing bits in PHY registers

Based on the recent introduction of phy_modify add helpers for setting
and clearing bits in PHY registers. First user is phylib.
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Signed-off-by: David S. Miller <davem@davemloft.net>