regulator: core: Add export of regulator_set_voltage_time_sel()

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

drivers/regulator/core.c

@@ -2330,6 +2330,7 @@ int regulator_set_voltage_time_sel(struct regulator_dev *rdev,
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(regulator_set_voltage_time_sel);
 
 /**
  * regulator_sync_voltage - re-apply last regulator output voltage