power: reset: zx-reboot: Unmap region obtained by of_iomap

Free memory mapping, if probe is not successful.
Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>

drivers/power/reset/zx-reboot.c

@@ -58,9 +58,12 @@ static int zx_reboot_probe(struct platform_device *pdev)
 	}
 
 	err = register_restart_handler(&zx_restart_nb);
-	if (err)
+	if (err) {
+		iounmap(base);
+		iounmap(pcu_base);
 		dev_err(&pdev->dev, "Register restart handler failed(err=%d)\n",
 			err);
+	}
 
 	return err;
 }