regulator: sm5703: Fix missing n_voltages for fixed regulators

Set n_voltages = 1 for fixed regulators.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Reviewed-by: Markuss Broks <markuss.broks@gmail.com>
Link: https://lore.kernel.org/r/20230409025529.241699-1-axel.lin@ingics.comSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/regulator/sm5703-regulator.c

@@ -42,6 +42,7 @@ static const int sm5703_buck_voltagemap[] = {
 		.type = REGULATOR_VOLTAGE,				\
 		.id = SM5703_USBLDO ## _id,				\
 		.ops = &sm5703_regulator_ops_fixed,			\
+		.n_voltages = 1,					\
 		.fixed_uV = SM5703_USBLDO_MICROVOLT,			\
 		.enable_reg = SM5703_REG_USBLDO12,			\
 		.enable_mask = SM5703_REG_EN_USBLDO ##_id,		\
@@ -56,6 +57,7 @@ static const int sm5703_buck_voltagemap[] = {
 		.type = REGULATOR_VOLTAGE,				\
 		.id = SM5703_VBUS,					\
 		.ops = &sm5703_regulator_ops_fixed,			\
+		.n_voltages = 1,					\
 		.fixed_uV = SM5703_VBUS_MICROVOLT,			\
 		.enable_reg = SM5703_REG_CNTL,				\
 		.enable_mask = SM5703_OPERATION_MODE_MASK,		\