net: mdio-mux: bcm-iproc: fix wrong getter and setter pair

mdio_mux_iproc_probe() uses platform_set_drvdata() to store md pointer
in device, whereas mdio_mux_iproc_remove() restores md pointer by
dev_get_platdata(&pdev->dev). This leads to wrong resources release.

The patch replaces getter to platform_get_drvdata.

Fixes: 98bc865a ("net: mdio-mux: Add MDIO mux driver for iProc SoCs")
Signed-off-by: Anton Vasilyev <vasilyev@ispras.ru>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/phy/mdio-mux-bcm-iproc.c

@@ -218,7 +218,7 @@ static int mdio_mux_iproc_probe(struct platform_device *pdev)
 
 static int mdio_mux_iproc_remove(struct platform_device *pdev)
 {
-	struct iproc_mdiomux_desc *md = dev_get_platdata(&pdev->dev);
+	struct iproc_mdiomux_desc *md = platform_get_drvdata(pdev);
 
 	mdio_mux_uninit(md->mux_handle);
 	mdiobus_unregister(md->mii_bus);