hwrng: ingenic - switch to device managed registration

Call devm_hwrng_register for device managed registration of the
ingenic-trng driver. ingenic_trng_remove can then be deleted.
Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/char/hw_random/ingenic-trng.c

@@ -98,7 +98,7 @@ static int ingenic_trng_probe(struct platform_device *pdev)
 	trng->rng.cleanup = ingenic_trng_cleanup;
 	trng->rng.read = ingenic_trng_read;
 
-	ret = hwrng_register(&trng->rng);
+	ret = devm_hwrng_register(&pdev->dev, &trng->rng);
 	if (ret)
 		return dev_err_probe(&pdev->dev, ret, "Failed to register hwrng\n");
 
@@ -108,15 +108,6 @@ static int ingenic_trng_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static int ingenic_trng_remove(struct platform_device *pdev)
-{
-	struct ingenic_trng *trng = platform_get_drvdata(pdev);
-
-	hwrng_unregister(&trng->rng);
-
-	return 0;
-}
-
 static const struct of_device_id ingenic_trng_of_match[] = {
 	{ .compatible = "ingenic,x1830-dtrng" },
 	{ /* sentinel */ }
@@ -125,7 +116,6 @@ MODULE_DEVICE_TABLE(of, ingenic_trng_of_match);
 
 static struct platform_driver ingenic_trng_driver = {
 	.probe		= ingenic_trng_probe,
-	.remove		= ingenic_trng_remove,
 	.driver		= {
 		.name	= "ingenic-trng",
 		.of_match_table = ingenic_trng_of_match,