net: mdio: remove redundant fwnode cleanup

net: mdio: remove redundant fwnode cleanup

Remove redundant fwnode cleanup in of_mdiobus_register_device()
and xpcs_plat_init_dev().

mdio_device_free() eventually calls mdio_device_release(),
which already performs fwnode_handle_put(), making the manual
cleanup unnecessary.

Combine fwnode_handle_get() with device_set_node() in
of_mdiobus_register_device() for clarity.

Signed-off-by: Buday Csaba <buday.csaba@prolan.hu>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://patch.msgid.link/00847693daa8f7c8ff5dfa19dd35fc712fa4e2b5.1763995734.git.buday.csaba@prolan.hu
Signed-off-by: Jakub Kicinski <kuba@kernel.org>