nvmem: mxs-ocotp: use devm_nvmem_register()

Use the resource managed variant of nvmem_register();
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/nvmem/mxs-ocotp.c

@@ -177,7 +177,7 @@ static int mxs_ocotp_probe(struct platform_device *pdev)
 	ocotp_config.size = data->size;
 	ocotp_config.priv = otp;
 	ocotp_config.dev = dev;
-	otp->nvmem = nvmem_register(&ocotp_config);
+	otp->nvmem = devm_nvmem_register(dev, &ocotp_config);
 	if (IS_ERR(otp->nvmem)) {
 		ret = PTR_ERR(otp->nvmem);
 		goto err_clk;
@@ -199,7 +199,7 @@ static int mxs_ocotp_remove(struct platform_device *pdev)
 
 	clk_unprepare(otp->clk);
 
-	return nvmem_unregister(otp->nvmem);
+	return 0;
 }
 
 static struct platform_driver mxs_ocotp_driver = {