tps6586x: Add device tree support

This commit adds device tree support for the TPS6586x regulator.

Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/drivers/regulator/tps6586x-regulator.c b/drivers/regulator/tps6586x-regulator.c
index 9a4029a..c0a2145 100644
--- a/drivers/regulator/tps6586x-regulator.c
+++ b/drivers/regulator/tps6586x-regulator.c
@@ -363,6 +363,7 @@
 		return err;
 
 	config.dev = &pdev->dev;
+	config.of_node = pdev->dev.of_node;
 	config.init_data = pdev->dev.platform_data;
 	config.driver_data = ri;