net: bfin_mac: Use phy_find_first() instead of open-coding it
Use phy_find_first() to find the first phy device instead of open-coding it. Cc: Andrew Lunn <andrew@lunn.ch> Signed-off-by: NGuenter Roeck <linux@roeck-us.net> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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