regulator: core: increment open_count when regulator supply is set

When registering the regulator and setting supply for the regulator
then increment open_count to reflect correct number of users.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

drivers/regulator/core.c

@@ -974,6 +974,7 @@ static int set_supply(struct regulator_dev *rdev,
 		err = -ENOMEM;
 		return err;
 	}
+	supply_rdev->open_count++;
 
 	return 0;
 }