mdio_bus: Remove unneeded gpiod NULL check
The gpiod API checks for NULL descriptors, so there is no need to duplicate the check in the driver. Signed-off-by: NFabio Estevam <fabio.estevam@nxp.com> Reviewed-by: NAndrew Lunn <andrew@lunn.ch> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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