regulator: pfuze100: Delete reference to ena_gpio

We now pass a GPIO descriptor to the core instead of a global
GPIO number, if this descriptor is NULL the GPIO line is not
used. Just delete the assignment of an invalid GPIO line.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/regulator/pfuze100-regulator.c

@@ -651,7 +651,6 @@ static int pfuze100_regulator_probe(struct i2c_client *client,
 		config.init_data = init_data;
 		config.driver_data = pfuze_chip;
 		config.of_node = match_of_node(i);
-		config.ena_gpio = -EINVAL;
 
 		pfuze_chip->regulators[i] =
 			devm_regulator_register(&client->dev, desc, &config);