of: overlay: Fix missing of_node_put() in error case of init_overlay_changeset()

In init_overlay_changeset(), the variable "node" is from
of_get_child_by_name(), and the "node" should be discarded in error case.

Fixes: d1651b0 ("of: overlay: add overlay symbols to live device tree")
Signed-off-by: Kunihiko Hayashi <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Rob Herring <[email protected]>

Author: khayash1

drivers/of/overlay.c

@@ -811,6 +811,7 @@ static int init_overlay_changeset(struct overlay_changeset *ovcs)
 		if (!fragment->target) {
 			pr_err("symbols in overlay, but not in live tree\n");
 			ret = -EINVAL;
+			of_node_put(node);
 			goto err_out;
 		}