net: phy: smsc: use phy_set_bits in smsc_phy_config_init

Simplify the code by using phy_set_bits().

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Link: https://lore.kernel.org/r/b64d9f86-d029-b911-bbe9-6ca6889399d7@gmail.com


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