regulator: core: Release regulator-regulator supplies on error

commit e81dba85 upstream.

If we fail while registering a regulator make sure we release the supply
for the regulator if there is one.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@ti.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

drivers/regulator/core.c

@@ -2765,6 +2765,8 @@ struct regulator_dev *regulator_register(struct regulator_desc *regulator_desc,
 	unset_regulator_supplies(rdev);
 
 scrub:
+	if (rdev->supply)
+		regulator_put(rdev->supply);
 	kfree(rdev->constraints);
 	device_unregister(&rdev->dev);
 	/* device core frees rdev */