regulator: ab8500: Use regulator_list_voltage_linear for fixed voltage

Both ab8500_regulator_mode_ops and ab8500_regulator_ops do not have volt_table
setting, thus we can not use regulator_list_voltage_table for them.
However, they have min_uV setting with n_voltages = 1, so use
regulator_list_voltage_linear instead.

Also remove setting set_voltage_time_sel for ab8500_regulator_mode_ops.
It is used only for fixed voltage, so it does not need to implement
set_voltage_time_sel.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

drivers/regulator/ab8500.c

@@ -363,8 +363,7 @@ static struct regulator_ops ab8500_regulator_mode_ops = {
 	.set_mode		= ab8500_regulator_set_mode,
 	.get_mode		= ab8500_regulator_get_mode,
 	.get_voltage_sel 	= ab8500_regulator_get_voltage_sel,
-	.list_voltage		= regulator_list_voltage_table,
-	.set_voltage_time_sel	= ab8500_regulator_set_voltage_time_sel,
+	.list_voltage		= regulator_list_voltage_linear,
 };
 
 static struct regulator_ops ab8500_regulator_ops = {
@@ -372,7 +371,7 @@ static struct regulator_ops ab8500_regulator_ops = {
 	.disable		= ab8500_regulator_disable,
 	.is_enabled		= ab8500_regulator_is_enabled,
 	.get_voltage_sel 	= ab8500_regulator_get_voltage_sel,
-	.list_voltage		= regulator_list_voltage_table,
+	.list_voltage		= regulator_list_voltage_linear,
 };
 
 static struct ab8500_regulator_info