MIPS: ralink: add missing put_device in ill_acc_of_setup

If of_find_device_by_node return 0 and ill_acc_of_setup return error,
pdev don't have a corresponding object release.

Fix it by adding put_device.
Signed-off-by: yu kuai <yukuai3@huawei.com>
Signed-off-by: Paul Burton <paulburton@kernel.org>
Cc: <john@phrozen.org>
Cc: <ralf@linux-mips.org>
Cc: <jhogan@kernel.org>
Cc: <linux-mips@vger.kernel.org>
Cc: <linux-kernel@vger.kernel.org>
Cc: <zhengbin13@huawei.com>
Cc: <yi.zhang@huawei.com>

arch/mips/ralink/ill_acc.c

@@ -67,11 +67,13 @@ static int __init ill_acc_of_setup(void)
 	irq = irq_of_parse_and_map(np, 0);
 	if (!irq) {
 		dev_err(&pdev->dev, "failed to get irq\n");
+		put_device(&pdev->dev);
 		return -EINVAL;
 	}
 
 	if (request_irq(irq, ill_acc_irq_handler, 0, "ill_acc", &pdev->dev)) {
 		dev_err(&pdev->dev, "failed to request irq\n");
+		put_device(&pdev->dev);
 		return -EINVAL;
 	}