hwrng: omap - Convert to devm_kzalloc()

Use devm_kzalloc() to make cleanup paths simpler.
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/char/hw_random/omap-rng.c

@@ -109,7 +109,8 @@ static int omap_rng_probe(struct platform_device *pdev)
 	struct omap_rng_private_data *priv;
 	int ret;
 
-	priv = kzalloc(sizeof(struct omap_rng_private_data), GFP_KERNEL);
+	priv = devm_kzalloc(&pdev->dev, sizeof(struct omap_rng_private_data),
+			    GFP_KERNEL);
 	if (!priv) {
 		dev_err(&pdev->dev, "could not allocate memory\n");
 		return -ENOMEM;
@@ -144,8 +145,6 @@ static int omap_rng_probe(struct platform_device *pdev)
 	priv->base = NULL;
 	pm_runtime_disable(&pdev->dev);
 err_ioremap:
-	kfree(priv);
-
 	return ret;
 }
 
@@ -160,10 +159,6 @@ static int __exit omap_rng_remove(struct platform_device *pdev)
 	pm_runtime_put_sync(&pdev->dev);
 	pm_runtime_disable(&pdev->dev);
 
-	release_mem_region(priv->mem_res->start, resource_size(priv->mem_res));
-
-	kfree(priv);
-
 	return 0;
 }