regulator: pf8x00: Use regulator_map_voltage_ascend for pf8x00_buck7_ops

The voltages in pf8x00_sw7_voltages are in ascendant order, so use
regulator_map_voltage_ascend.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Reviewed-by: Jagan Teki <jagan@amarulasolutions.com>
Reviewed-by: Adrien Grassein <adrien.grassein@gmail.com>
Link: https://lore.kernel.org/r/20210216060128.126938-1-axel.lin@ingics.comSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/regulator/pf8x00-regulator.c

@@ -359,6 +359,7 @@ static const struct regulator_ops pf8x00_buck7_ops = {
 	.disable = regulator_disable_regmap,
 	.is_enabled = regulator_is_enabled_regmap,
 	.list_voltage = regulator_list_voltage_table,
+	.map_voltage = regulator_map_voltage_ascend,
 	.set_voltage_sel = regulator_set_voltage_sel_regmap,
 	.get_voltage_sel = regulator_get_voltage_sel_regmap,
 	.get_current_limit = regulator_get_current_limit_regmap,