reset: Make reset_control_ops const

The ops pointer is holding a pointer to a structure that is usually not
modified. Make it const.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
diff --git a/include/linux/reset-controller.h b/include/linux/reset-controller.h
index ce6b962..a3a5bcd 100644
--- a/include/linux/reset-controller.h
+++ b/include/linux/reset-controller.h
@@ -38,7 +38,7 @@
  * @nr_resets: number of reset controls in this reset controller device
  */
 struct reset_controller_dev {
-	struct reset_control_ops *ops;
+	const struct reset_control_ops *ops;
 	struct module *owner;
 	struct list_head list;
 	struct device_node *of_node;