regulator: mc13xxx: Remove mc13xxx_sw_regulator_is_enabled function

If .is_enabled callback is not implemented, regulator core assumes that the
regulator is always on. Thus we don't need mc13xxx_sw_regulator_is_enabled
function.
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

drivers/regulator/mc13892-regulator.c

@@ -469,7 +469,6 @@ static int mc13892_sw_regulator_set_voltage_sel(struct regulator_dev *rdev,
 }
 
 static struct regulator_ops mc13892_sw_regulator_ops = {
-	.is_enabled = mc13xxx_sw_regulator_is_enabled,
 	.list_voltage = regulator_list_voltage_table,
 	.set_voltage_sel = mc13892_sw_regulator_set_voltage_sel,
 	.get_voltage = mc13892_sw_regulator_get_voltage,

drivers/regulator/mc13xxx-regulator-core.c

@@ -170,12 +170,6 @@ struct regulator_ops mc13xxx_fixed_regulator_ops = {
 };
 EXPORT_SYMBOL_GPL(mc13xxx_fixed_regulator_ops);
 
-int mc13xxx_sw_regulator_is_enabled(struct regulator_dev *rdev)
-{
-	return 1;
-}
-EXPORT_SYMBOL_GPL(mc13xxx_sw_regulator_is_enabled);
-
 #ifdef CONFIG_OF
 int __devinit mc13xxx_get_num_regulators_dt(struct platform_device *pdev)
 {

drivers/regulator/mc13xxx.h

@@ -33,7 +33,6 @@ struct mc13xxx_regulator_priv {
 };
 
 extern int mc13xxx_sw_regulator(struct regulator_dev *rdev);
-extern int mc13xxx_sw_regulator_is_enabled(struct regulator_dev *rdev);
 extern int mc13xxx_fixed_regulator_set_voltage(struct regulator_dev *rdev,
 		int min_uV, int max_uV, unsigned *selector);
 extern int mc13xxx_fixed_regulator_get_voltage(struct regulator_dev *rdev);