net/fec: set con_id in clk_get() call to NULL

The con_id is actually not needed for clk_get().

Signed-off-by: Lothar Waßmann <LW@KARO-electronics.de>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/freescale/fec.c

@@ -1585,7 +1585,7 @@ fec_probe(struct platform_device *pdev)
 		}
 	}
 
-	fep->clk = clk_get(&pdev->dev, "fec_clk");
+	fep->clk = clk_get(&pdev->dev, NULL);
 	if (IS_ERR(fep->clk)) {
 		ret = PTR_ERR(fep->clk);
 		goto failed_clk;