backlight: 88pm860x_bl: Use of_get_child_by_name() instead of refcount hack

of_find_node_by_name() calls of_node_put() on its "from" parameter.
To counter this, pm860x_backlight_dt_init() calls of_node_get() first.

Use of_get_child_by_name() instead to get rid of the refcount hack.

Signed-off-by: Geert Uytterhoeven <[e-mail]>
Signed-off-by: Lee Jones <[e-mail]>

drivers/video/backlight/88pm860x_bl.c

···
 	struct device_node *nproot, *np;
 	int iset = 0;
 
-	nproot = of_node_get(pdev->dev.parent->of_node);
-	if (!nproot)
-		return -ENODEV;
-	nproot = of_find_node_by_name(nproot, "backlights");
+	nproot = of_get_child_by_name(pdev->dev.parent->of_node, "backlights");
 	if (!nproot) {
 		dev_err(&pdev->dev, "failed to find backlights node\n");
 		return -ENODEV;