mdio_bus: suppress err message for reset gpio EPROBE_DEFER
The mdio_bus may have dependencies from GPIO controller and so got
deferred. Now it will print error message every time -EPROBE_DEFER is
returned which from:
__mdiobus_register()
|-devm_gpiod_get_optional()
without actually identifying error code.
"mdio_bus
4a101000.mdio: mii_bus
4a101000.mdio couldn't get reset GPIO"
Hence, suppress error message for devm_gpiod_get_optional() returning
-EPROBE_DEFER case by using dev_err_probe().
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Link: https://lore.kernel.org/r/20201119203446.20857-1-grygorii.strashko@ti.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>