net: phy: add helper phy_polling_mode
Add a helper for checking whether polling is used to detect PHY status changes. Signed-off-by: NHeiner Kallweit <hkallweit1@gmail.com> Reviewed-by: NAndrew Lunn <andrew@lunn.ch> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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