da9030_battery: Use devm_kzalloc()

Use devm_kzalloc() to make cleanup paths more simple.

Signed-off-by: Jingoo Han <[e-mail]>
Signed-off-by: Anton Vorontsov <[e-mail]>

drivers/power/da9030_battery.c

···
 	    pdata->charge_millivolt > 4350)
 		return -EINVAL;
 
-	charger = kzalloc(sizeof(*charger), GFP_KERNEL);
+	charger = devm_kzalloc(&pdev->dev, sizeof(*charger), GFP_KERNEL);
 	if (charger == NULL)
 		return -ENOMEM;
 
···
 	cancel_delayed_work(&charger->work);
 
 err_charger_init:
-	kfree(charger);
-
 	return ret;
 }
 
···
 	cancel_delayed_work_sync(&charger->work);
 	da9030_set_charge(charger, 0);
 	power_supply_unregister(&charger->psy);
-
-	kfree(charger);
 
 	return 0;
 }