regulator: AXP20x: fix wrong call to of_find_node_by_name

The of_find_node_by_name function will search for a DT node named
"regulators" after the provided np node, but will not ensure that this node
is a child of np.
This might result in retrieving a "regulators" node that is not related to
the axp20x PMIC.

Signed-off-by: Boris BREZILLON <[e-mail]>
Acked-by: Carlo Caione <[e-mail]>
Signed-off-by: Mark Brown <[e-mail]>

drivers/regulator/axp20x-regulator.c

···
 	if (!np)
 		return 0;
 
-	regulators = of_find_node_by_name(np, "regulators");
+	regulators = of_get_child_by_name(np, "regulators");
 	if (!regulators) {
 		dev_warn(&pdev->dev, "regulators node not found\n");
 	} else {