regulator: 88pm8607: Fix writting value to vol_reg in pm8607_set_voltage_sel

commit 4ca1e1d9 "regulator: Convert 88pm8607 to set_voltage_sel" accidentally
changed the value writing to vol_reg.
What we want is to write val instead of selector to vol_reg.
Signed-off-by: NAxel Lin <axel.lin@gmail.com>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

drivers/regulator/88pm8607.c

@@ -232,7 +232,7 @@ static int pm8607_set_voltage_sel(struct regulator_dev *rdev, unsigned selector)
 	val = (uint8_t)(selector << info->vol_shift);
 	mask = (rdev->desc->n_voltages - 1)  << info->vol_shift;
 
-	ret = pm860x_set_bits(info->i2c, info->vol_reg, mask, selector);
+	ret = pm860x_set_bits(info->i2c, info->vol_reg, mask, val);
 	if (ret)
 		return ret;
 	switch (info->desc.id) {