net: phy: smsc: use device_property_present in smsc_phy_probe

Use unified device property API.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Link: https://lore.kernel.org/r/a969f012-1d3b-7a36-51cf-89a5f8f15a9b@gmail.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>