regulator: core: Avoid negative regulator no & initialize it to -1

This patch initializes regulator_no to -1 to avoid extra subtraction
operation performed every time we register a regulator and avoid negative
regulator no in its name.
Signed-off-by: Aniroop Mathur <a.mathur@samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/regulator/core.c

@@ -3585,7 +3585,7 @@ regulator_register(const struct regulator_desc *regulator_desc,
 {
 	const struct regulation_constraints *constraints = NULL;
 	const struct regulator_init_data *init_data;
-	static atomic_t regulator_no = ATOMIC_INIT(0);
+	static atomic_t regulator_no = ATOMIC_INIT(-1);
 	struct regulator_dev *rdev;
 	struct device *dev;
 	int ret, i;
@@ -3658,8 +3658,8 @@ regulator_register(const struct regulator_desc *regulator_desc,
 	/* register with sysfs */
 	rdev->dev.class = &regulator_class;
 	rdev->dev.parent = dev;
-	dev_set_name(&rdev->dev, "regulator.%d",
-		     atomic_inc_return(&regulator_no) - 1);
+	dev_set_name(&rdev->dev, "regulator.%lu",
+		     atomic_inc_return(&regulator_no));
 	ret = device_register(&rdev->dev);
 	if (ret != 0) {
 		put_device(&rdev->dev);