power: reset: rmobile-reset: Use devm_platform_ioremap_resource() helper

Use device life-cycle managed ioremap function to simplify probe and
exit paths.
Signed-off-by: Andrew Davis <afd@ti.com>
Link: https://lore.kernel.org/r/20240212162831.67838-10-afd@ti.comSigned-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>

drivers/power/reset/rmobile-reset.c

@@ -41,28 +41,23 @@ static int rmobile_reset_probe(struct platform_device *pdev)
 {
 	int error;
 
-	sysc_base2 = of_iomap(pdev->dev.of_node, 1);
-	if (!sysc_base2)
-		return -ENODEV;
+	sysc_base2 = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(sysc_base2))
+		return PTR_ERR(sysc_base2);
 
 	error = register_restart_handler(&rmobile_reset_nb);
 	if (error) {
 		dev_err(&pdev->dev,
 			"cannot register restart handler (err=%d)\n", error);
-		goto fail_unmap;
+		return error;
 	}
 
 	return 0;
-
-fail_unmap:
-	iounmap(sysc_base2);
-	return error;
 }
 
 static void rmobile_reset_remove(struct platform_device *pdev)
 {
 	unregister_restart_handler(&rmobile_reset_nb);
-	iounmap(sysc_base2);
 }
 
 static const struct of_device_id rmobile_reset_of_match[] = {