regulator: pass regulator_register of_node in fixed voltage driver

regulator_get needs of_node to find right regulator.

Signed-off-by: Richard Zhao <richard.zhao@linaro.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/drivers/regulator/fixed.c b/drivers/regulator/fixed.c
index a44a017..393f039 100644
--- a/drivers/regulator/fixed.c
+++ b/drivers/regulator/fixed.c
@@ -246,7 +246,8 @@
 	}
 
 	drvdata->dev = regulator_register(&drvdata->desc, &pdev->dev,
-					  config->init_data, drvdata, NULL);
+					  config->init_data, drvdata,
+					  pdev->dev.of_node);
 	if (IS_ERR(drvdata->dev)) {
 		ret = PTR_ERR(drvdata->dev);
 		dev_err(&pdev->dev, "Failed to register regulator: %d\n", ret);