regulator: rk808: Fix n_voltages for DCDC4

The min_sel is 0, max_sel is 15, so n_voltages should be 16.
Signed-off-by: NAxel Lin <axel.lin@ingics.com>
Signed-off-by: NMark Brown <broonie@kernel.org>

drivers/regulator/rk808-regulator.c

@@ -146,7 +146,7 @@ static const struct regulator_desc rk808_reg[] = {
 		.id = RK808_ID_DCDC4,
 		.ops = &rk808_reg_ops,
 		.type = REGULATOR_VOLTAGE,
-		.n_voltages = 17,
+		.n_voltages = 16,
 		.linear_ranges = rk808_buck4_voltage_ranges,
 		.n_linear_ranges = ARRAY_SIZE(rk808_buck4_voltage_ranges),
 		.vsel_reg = RK808_BUCK4_ON_VSEL_REG,