regulator: scmi: Add missing of_node_get()

In scmi_regulator_probe(), of_find_node_by_name() will decrease
the refcount of its first argument and we need a of_node_get()
to keep reference balance.
Signed-off-by: Liang He <windhl@126.com>
Reviewed-by: Cristian Marussi <cristian.marussi@arm.com>
Link: https://lore.kernel.org/r/20220622034816.4094043-1-windhl@126.comSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/regulator/scmi-regulator.c

@@ -343,6 +343,7 @@ static int scmi_regulator_probe(struct scmi_device *sdev)
 	 * plausible SCMI Voltage Domain number, all belonging to this SCMI
 	 * platform instance node (handle->dev->of_node).
 	 */
+	of_node_get(handle->dev->of_node);
 	np = of_find_node_by_name(handle->dev->of_node, "regulators");
 	for_each_child_of_node(np, child) {
 		ret = process_scmi_regulator_of_node(sdev, ph, child, rinfo);