regulator: max1586 - improve the logic of choosing selector

A little bit improvement in the logic of choosing selector.
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>

drivers/regulator/max1586.c

@@ -121,14 +121,14 @@ static int max1586_v6_set(struct regulator_dev *rdev, int min_uV, int max_uV)
 	if (max_uV < MAX1586_V6_MIN_UV || max_uV > MAX1586_V6_MAX_UV)
 		return -EINVAL;
 
-	if (min_uV >= 3000000)
-		selector = 3;
-	if (min_uV < 3000000)
-		selector = 2;
-	if (min_uV < 2500000)
-		selector = 1;
 	if (min_uV < 1800000)
 		selector = 0;
+	else if (min_uV < 2500000)
+		selector = 1;
+	else if (min_uV < 3000000)
+		selector = 2;
+	else if (min_uV >= 3000000)
+		selector = 3;
 
 	if (max1586_v6_calc_voltage(selector) > max_uV)
 		return -EINVAL;