net: of_mdio: use PHY_MAX_ADDR constant
net: of_mdio: use PHY_MAX_ADDR constant

Use the PHY_MAX_ADDR constant for checking if a MDIO bus address is
valid instead of using a plain "32".

Signed-off-by: Florian Fainelli <59190c1867e3222b932a0de3c668eb2d980d69a2@gmail.com>
Signed-off-by: David S. Miller <fe08d3c717adf2ae63592e4c9aec6e3e404d8e3e@davemloft.net>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs