regulator: da9062: Simplify da9062_buck_set_mode for BUCK_MODE_MANUAL case

The sleep flag bit decides the mode for BUCK_MODE_MANUAL case, simplify
the logic as the result is the same.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Reviewed-by: Adam Thomson <Adam.Thomson.Opensource@diasemi.com>
Link: https://lore.kernel.org/r/20191007115009.25672-2-axel.lin@ingics.comSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/regulator/da9062-regulator.c

@@ -136,7 +136,7 @@ static int da9062_buck_set_mode(struct regulator_dev *rdev, unsigned mode)
 static unsigned da9062_buck_get_mode(struct regulator_dev *rdev)
 {
 	struct da9062_regulator *regl = rdev_get_drvdata(rdev);
-	unsigned int val, mode = 0;
+	unsigned int val;
 	int ret;
 
 	ret = regmap_field_read(regl->mode, &val);
@@ -146,7 +146,6 @@ static unsigned da9062_buck_get_mode(struct regulator_dev *rdev)
 	switch (val) {
 	default:
 	case BUCK_MODE_MANUAL:
-		mode = REGULATOR_MODE_FAST | REGULATOR_MODE_STANDBY;
 		/* Sleep flag bit decides the mode */
 		break;
 	case BUCK_MODE_SLEEP:
@@ -162,11 +161,9 @@ static unsigned da9062_buck_get_mode(struct regulator_dev *rdev)
 		return 0;
 
 	if (val)
-		mode &= REGULATOR_MODE_STANDBY;
+		return REGULATOR_MODE_STANDBY;
 	else
-		mode &= REGULATOR_MODE_NORMAL | REGULATOR_MODE_FAST;
-
-	return mode;
+		return REGULATOR_MODE_FAST;
 }
 
 /*