mfd: wm8994: Use devm_regulator_bulk_get API

devm_regulator_bulk_get is device managed and saves some cleanup
and exit code.
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

drivers/mfd/wm8994-core.c

@@ -467,7 +467,7 @@ static int wm8994_device_init(struct wm8994 *wm8994, int irq)
 		goto err;
 	}
 		
-	ret = regulator_bulk_get(wm8994->dev, wm8994->num_supplies,
+	ret = devm_regulator_bulk_get(wm8994->dev, wm8994->num_supplies,
 				 wm8994->supplies);
 	if (ret != 0) {
 		dev_err(wm8994->dev, "Failed to get supplies: %d\n", ret);
@@ -478,7 +478,7 @@ static int wm8994_device_init(struct wm8994 *wm8994, int irq)
 				    wm8994->supplies);
 	if (ret != 0) {
 		dev_err(wm8994->dev, "Failed to enable supplies: %d\n", ret);
-		goto err_get;
+		goto err;
 	}
 
 	ret = wm8994_reg_read(wm8994, WM8994_SOFTWARE_RESET);
@@ -658,8 +658,6 @@ static int wm8994_device_init(struct wm8994 *wm8994, int irq)
 err_enable:
 	regulator_bulk_disable(wm8994->num_supplies,
 			       wm8994->supplies);
-err_get:
-	regulator_bulk_free(wm8994->num_supplies, wm8994->supplies);
 err:
 	mfd_remove_devices(wm8994->dev);
 	return ret;
@@ -672,7 +670,6 @@ static void wm8994_device_exit(struct wm8994 *wm8994)
 	wm8994_irq_exit(wm8994);
 	regulator_bulk_disable(wm8994->num_supplies,
 			       wm8994->supplies);
-	regulator_bulk_free(wm8994->num_supplies, wm8994->supplies);
 }
 
 static const struct of_device_id wm8994_of_match[] = {