regulator: mt6315: Fix off-by-one for .n_voltages

The valid selector is 0 ~ 0xbf, so the .n_voltages should be 0xc0.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Link: https://lore.kernel.org/r/20210311020558.579597-1-axel.lin@ingics.com
Signed-off-by: Mark Brown <broonie@kernel.org>

Author: AxelLin

drivers/regulator/mt6315-regulator.c

@@ -41,7 +41,7 @@ struct mt6315_chip {
 		.type = REGULATOR_VOLTAGE,			\
 		.id = _bid,					\
 		.owner = THIS_MODULE,				\
-		.n_voltages = 0xbf,				\
+		.n_voltages = 0xc0,				\
 		.linear_ranges = mt_volt_range1,		\
 		.n_linear_ranges = ARRAY_SIZE(mt_volt_range1),	\
 		.vsel_reg = _vsel,				\