regulator: rk808: Fix missing of_node_put

1. Pass &pdev->dev rather than &client->dev to of_regulator_match, the *dev
   argument is used for devres to ensure devm_of_regulator_put_matches() will
   be called when unload the module.

2. of_get_child_by_name() returns a node pointer with refcount incremented.
   Thus add missing of_node_put(reg_np).
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/regulator/rk808-regulator.c

@@ -281,8 +281,9 @@ static int rk808_regulator_probe(struct platform_device *pdev)
 	if (!reg_np)
 		return -ENXIO;
 
-	ret = of_regulator_match(&client->dev, reg_np, rk808_reg_matches,
+	ret = of_regulator_match(&pdev->dev, reg_np, rk808_reg_matches,
 				 RK808_NUM_REGULATORS);
+	of_node_put(reg_np);
 	if (ret < 0)
 		return ret;