ACPI: Update Container hotplug error messages

Updated Container hotplug error messages with acpi_handle_<level>()
and pr_<level>(). Removed an unnecessary check to the device arg
in acpi_container_add().

Signed-off-by: Toshi Kani <[e-mail]>
Signed-off-by: Rafael J. Wysocki <[e-mail]>

drivers/acpi/container.c

···
 {
 	struct acpi_container *container;
 
-
-	if (!device) {
-		printk(KERN_ERR PREFIX "device is NULL\n");
-		return -EINVAL;
-	}
-
 	container = kzalloc(sizeof(struct acpi_container), GFP_KERNEL);
 	if (!container)
 		return -ENOMEM;
···
 	case ACPI_NOTIFY_BUS_CHECK:
 		/* Fall through */
 	case ACPI_NOTIFY_DEVICE_CHECK:
-		printk(KERN_WARNING "Container driver received %s event\n",
+		pr_debug("Container driver received %s event\n",
 		       (type == ACPI_NOTIFY_BUS_CHECK) ?
 		       "ACPI_NOTIFY_BUS_CHECK" : "ACPI_NOTIFY_DEVICE_CHECK");
 
···
 
 		result = container_device_add(&device, handle);
 		if (result) {
-			printk(KERN_WARNING "Failed to add container\n");
+			acpi_handle_warn(handle, "Failed to add container\n");
 			break;
 		}