regulator: set constraints.apply_uV to 0 in of_get_fixed_voltage_config

Fix fixed regulator using DT failed to call regulator_register.

of_get_regulator_init_data set apply_uV to 1, but fixed regulator
doesn't need it. Set it back to 0.
Signed-off-by: Richard Zhao <richard.zhao@linaro.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

drivers/regulator/fixed.c

@@ -69,6 +69,7 @@ of_get_fixed_voltage_config(struct device *dev)
 		return NULL;
 
 	init_data = config->init_data;
+	init_data->constraints.apply_uV = 0;
 
 	config->supply_name = init_data->constraints.name;
 	if (init_data->constraints.min_uV == init_data->constraints.max_uV) {