net: mdio-mux-gpio: use dev_get_platdata()

Use the wrapper function for retrieving the platform data instead of
accessing dev->platform_data directly. This is a cosmetic change
to make the code simpler and enhance the readability.
Signed-off-by: NJingoo Han <jg1.han@samsung.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/phy/mdio-mux-gpio.c

@@ -106,7 +106,7 @@ static int mdio_mux_gpio_probe(struct platform_device *pdev)
 
 static int mdio_mux_gpio_remove(struct platform_device *pdev)
 {
-	struct mdio_mux_gpio_state *s = pdev->dev.platform_data;
+	struct mdio_mux_gpio_state *s = dev_get_platdata(&pdev->dev);
 	mdio_mux_uninit(s->mux_handle);
 	return 0;
 }