net: of_mdio: parse "max-speed" property to set PHY supported features
The "max-speed" property is defined per the ePAPR specification to express the maximum speed a PHY supports. Use that property, if present to set the phydev->supported features which properly restricts the PHY within the range of defined speeds. Signed-off-by: NFlorian Fainelli <f.fainelli@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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