regulator: pass additional of_node to regulator_register()

With device tree support for regulators, its needed that the
regulator_dev->dev device has the right of_node attached.
To be able to do this add an additional parameter to the
regulator_register() api, wherein the dt-adapted driver can
then pass this additional info onto the regulator core.

Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/drivers/regulator/max1586.c b/drivers/regulator/max1586.c
index 3f49512..40e7a4d 100644
--- a/drivers/regulator/max1586.c
+++ b/drivers/regulator/max1586.c
@@ -214,7 +214,7 @@
 		}
 		rdev[i] = regulator_register(&max1586_reg[id], &client->dev,
 					     pdata->subdevs[i].platform_data,
-					     max1586);
+					     max1586, NULL);
 		if (IS_ERR(rdev[i])) {
 			ret = PTR_ERR(rdev[i]);
 			dev_err(&client->dev, "failed to register %s\n",