regulator: tps6507x: Use regulator_map_voltage_ascend

All regulators have ascendant voltage list in this driver.
Use regulator_map_voltage_ascend for them.

Signed-off-by: Axel Lin <[e-mail]>
Signed-off-by: Mark Brown <[e-mail]>

drivers/regulator/tps6507x-regulator.c

···
 	.get_voltage_sel = tps6507x_pmic_get_voltage_sel,
 	.set_voltage_sel = tps6507x_pmic_set_voltage_sel,
 	.list_voltage = regulator_list_voltage_table,
+	.map_voltage = regulator_map_voltage_ascend,
 };
 
 #ifdef CONFIG_OF