mfd: Convert WM8400 to devm_kzalloc()

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

drivers/mfd/wm8400-core.c

@@ -344,7 +344,7 @@ static int wm8400_i2c_probe(struct i2c_client *i2c,
 	struct wm8400 *wm8400;
 	int ret;
 
-	wm8400 = kzalloc(sizeof(struct wm8400), GFP_KERNEL);
+	wm8400 = devm_kzalloc(&i2c->dev, sizeof(struct wm8400), GFP_KERNEL);
 	if (wm8400 == NULL) {
 		ret = -ENOMEM;
 		goto err;
@@ -353,7 +353,7 @@ static int wm8400_i2c_probe(struct i2c_client *i2c,
 	wm8400->regmap = regmap_init_i2c(i2c, &wm8400_regmap_config);
 	if (IS_ERR(wm8400->regmap)) {
 		ret = PTR_ERR(wm8400->regmap);
-		goto struct_err;
+		goto err;
 	}
 
 	wm8400->dev = &i2c->dev;
@@ -367,8 +367,6 @@ static int wm8400_i2c_probe(struct i2c_client *i2c,
 
 map_err:
 	regmap_exit(wm8400->regmap);
-struct_err:
-	kfree(wm8400);
 err:
 	return ret;
 }
@@ -379,7 +377,6 @@ static int wm8400_i2c_remove(struct i2c_client *i2c)
 
 	wm8400_release(wm8400);
 	regmap_exit(wm8400->regmap);
-	kfree(wm8400);
 
 	return 0;
 }