regulator: remove redundant ret variable

Return value from regmap_update_bits() directly instead
of taking this in another redundant variable.
Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: Minghao Chi <chi.minghao@zte.com.cn>
Signed-off-by: CGEL ZTE <cgel.zte@gmail.com>
Link: https://lore.kernel.org/r/20220104104139.601031-1-chi.minghao@zte.com.cnSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/regulator/mt6380-regulator.c

@@ -183,7 +183,7 @@ static const unsigned int ldo_volt_table4[] = {
 static int mt6380_regulator_set_mode(struct regulator_dev *rdev,
 				     unsigned int mode)
 {
-	int ret, val = 0;
+	int val = 0;
 	struct mt6380_regulator_info *info = rdev_get_drvdata(rdev);
 
 	switch (mode) {
@@ -199,10 +199,8 @@ static int mt6380_regulator_set_mode(struct regulator_dev *rdev,
 
 	val <<= ffs(info->modeset_mask) - 1;
 
-	ret = regmap_update_bits(rdev->regmap, info->modeset_reg,
+	return regmap_update_bits(rdev->regmap, info->modeset_reg,
 				 info->modeset_mask, val);
-
-	return ret;
 }
 
 static unsigned int mt6380_regulator_get_mode(struct regulator_dev *rdev)