net: phy: remove generic settings for callbacks config_aneg and read_status from drivers

Remove generic settings for callbacks config_aneg and read_status
from drivers.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>