net: sun4i-emac: fix a typo in emac_probe()

Just fixed a typo in emac_probe().
Signed-off-by: NWei Yongjun <yongjun_wei@trendmicro.com.cn>
Acked-by: NMaxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/allwinner/sun4i-emac.c

@@ -821,7 +821,7 @@ static int emac_probe(struct platform_device *pdev)
 	db->membase = of_iomap(np, 0);
 	if (!db->membase) {
 		dev_err(&pdev->dev, "failed to remap registers\n");
-		return -ENOMEM;
+		ret = -ENOMEM;
 		goto out;
 	}