regulator: tps51632: Fix writing to wrong register when enable_pwm_dvfs is set

When tps->enable_pwm_dvfs is true, write to TPS51632_VOLTAGE_BASE_REG rather
than TPS51632_VOLTAGE_SELECT_REG.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

drivers/regulator/tps51632-regulator.c

@@ -128,7 +128,7 @@ static int tps51632_dcdc_set_voltage_sel(struct regulator_dev *rdev,
 	if (vsel > TPS51632_MAX_VSEL)
 		return -EINVAL;
 
-	ret = regmap_write(tps->regmap, TPS51632_VOLTAGE_SELECT_REG, vsel);
+	ret = regmap_write(tps->regmap, reg, vsel);
 	if (ret < 0)
 		dev_err(tps->dev, "reg write failed, err %d\n", ret);
 	return ret;