clk: sunxi-ng: de2: fix wrong pointer passed to PTR_ERR()

PTR_ERR should access the value just tested by IS_ERR, otherwise
the wrong error code will be returned.

Fixes: b0d9a4bd52bd ("clk: sunxi-ng: add support for DE2 CCU")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>

drivers/clk/sunxi-ng/ccu-sun8i-de2.c

@@ -184,7 +184,7 @@ static int sunxi_de2_clk_probe(struct platform_device *pdev)
 
 	rstc = devm_reset_control_get_exclusive(&pdev->dev, NULL);
 	if (IS_ERR(rstc)) {
-		ret = PTR_ERR(bus_clk);
+		ret = PTR_ERR(rstc);
 		if (ret != -EPROBE_DEFER)
 			dev_err(&pdev->dev,
 				"Couldn't get reset control: %d\n", ret);