regulator: max8907: Fix n_voltages for MAX8907B SD1

For linear voltage mapping, the n_voltages is (max - min) / step + 1
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

drivers/regulator/max8907-regulator.c

@@ -286,7 +286,8 @@ static __devinit int max8907_regulator_probe(struct platform_device *pdev)
 	    MAX8907_II2RR_VERSION_REV_B) {
 		pmic->desc[MAX8907_SD1].min_uV = 637500;
 		pmic->desc[MAX8907_SD1].uV_step = 12500;
-		pmic->desc[MAX8907_SD1].n_voltages = (1425000 - 637500) / 12500;
+		pmic->desc[MAX8907_SD1].n_voltages =
+						(1425000 - 637500) / 12500 + 1;
 	}
 
 	for (i = 0; i < MAX8907_NUM_REGULATORS; i++) {