mfd: twl4030-audio: Convert to use devm_kzalloc

To clean up the module probe and remove functions.
Signed-off-by: NPeter Ujfalusi <peter.ujfalusi@ti.com>
Acked-by: NSamuel Ortiz <sameo@linux.intel.com>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

drivers/mfd/twl4030-audio.c

@@ -188,7 +188,8 @@ static int __devinit twl4030_audio_probe(struct platform_device *pdev)
 	twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE,
 					val, TWL4030_REG_APLL_CTL);
 
-	audio = kzalloc(sizeof(struct twl4030_audio), GFP_KERNEL);
+	audio = devm_kzalloc(&pdev->dev, sizeof(struct twl4030_audio),
+			     GFP_KERNEL);
 	if (!audio)
 		return -ENOMEM;
 
@@ -229,22 +230,18 @@ static int __devinit twl4030_audio_probe(struct platform_device *pdev)
 		ret = -ENODEV;
 	}
 
-	if (!ret)
-		return 0;
+	if (ret) {
+		platform_set_drvdata(pdev, NULL);
+		twl4030_audio_dev = NULL;
+	}
 
-	platform_set_drvdata(pdev, NULL);
-	kfree(audio);
-	twl4030_audio_dev = NULL;
 	return ret;
 }
 
 static int __devexit twl4030_audio_remove(struct platform_device *pdev)
 {
-	struct twl4030_audio *audio = platform_get_drvdata(pdev);
-
 	mfd_remove_devices(&pdev->dev);
 	platform_set_drvdata(pdev, NULL);
-	kfree(audio);
 	twl4030_audio_dev = NULL;
 
 	return 0;