regulator: rk808: Fix uninitialized value

The RK808 regulator driver was putting its config on the stack but not
initting it.  That means that you got a semi-random config.  Fix this.
Signed-off-by: NDoug Anderson <dianders@chromium.org>
Signed-off-by: NMark Brown <broonie@linaro.org>

drivers/regulator/rk808-regulator.c

@@ -334,7 +334,7 @@ static int rk808_regulator_probe(struct platform_device *pdev)
 {
 	struct rk808 *rk808 = dev_get_drvdata(pdev->dev.parent);
 	struct rk808_board *pdata;
-	struct regulator_config config;
+	struct regulator_config config = {};
 	struct regulator_dev *rk808_rdev;
 	struct regulator_init_data *reg_data;
 	int i = 0;