leds: leds-wm8350: Use dev_err instead of printk

Fixes the following type of checkpatch warnings:
WARNING: Prefer netdev_err(netdev, ... then dev_err(dev, ...
then pr_err(...  to printk(KERN_ERR ...

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
diff --git a/drivers/leds/leds-wm8350.c b/drivers/leds/leds-wm8350.c
index 88f23f8..ed15157 100644
--- a/drivers/leds/leds-wm8350.c
+++ b/drivers/leds/leds-wm8350.c
@@ -216,13 +216,13 @@
 
 	isink = devm_regulator_get(&pdev->dev, "led_isink");
 	if (IS_ERR(isink)) {
-		printk(KERN_ERR "%s: can't get ISINK\n", __func__);
+		dev_err(&pdev->dev, "%s: can't get ISINK\n", __func__);
 		return PTR_ERR(isink);
 	}
 
 	dcdc = devm_regulator_get(&pdev->dev, "led_vcc");
 	if (IS_ERR(dcdc)) {
-		printk(KERN_ERR "%s: can't get DCDC\n", __func__);
+		dev_err(&pdev->dev, "%s: can't get DCDC\n", __func__);
 		return PTR_ERR(dcdc);
 	}