mfd: pcf50633-adc: Use devm_*() functions

Use devm_*() functions to make cleanup paths simpler.
Signed-off-by: NJingoo Han <jg1.han@samsung.com>
Signed-off-by: NLee Jones <lee.jones@linaro.org>

drivers/mfd/pcf50633-adc.c

@@ -203,7 +203,7 @@ static int pcf50633_adc_probe(struct platform_device *pdev)
 {
 	struct pcf50633_adc *adc;
 
-	adc = kzalloc(sizeof(*adc), GFP_KERNEL);
+	adc = devm_kzalloc(&pdev->dev, sizeof(*adc), GFP_KERNEL);
 	if (!adc)
 		return -ENOMEM;
 
@@ -236,7 +236,6 @@ static int pcf50633_adc_remove(struct platform_device *pdev)
 		kfree(adc->queue[i]);
 
 	mutex_unlock(&adc->queue_mutex);
-	kfree(adc);
 
 	return 0;
 }