regulator: devres: unexport devm_regulator_unregister_supply_alias()

This API hook isn't used anywhere outside of the regulator devres code.
This function is needed for the devm_regulator_bulk_register_supply_alias()
function on the error path, to cleanup any previously registered supply
aliases.

This change makes the devm_regulator_unregister_supply_alias() local to the
regulator core framework, to avoid it being used in any weird logic.
It's also removing the doc-string for
devm_regulator_unregister_supply_alias(), since it doesn't need to be
documented anymore, as no other external consumer should use it.

Signed-off-by: Alexandru Ardelean <aardelean@deviqon.com>
Link: https://lore.kernel.org/r/20210625122324.327585-5-aardelean@deviqon.com
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/regulator/devres.c

@@ -267,19 +267,8 @@ int devm_regulator_register_supply_alias(struct device *dev, const char *id,
 }
 EXPORT_SYMBOL_GPL(devm_regulator_register_supply_alias);
 
-/**
- * devm_regulator_unregister_supply_alias - Resource managed
- * regulator_unregister_supply_alias()
- *
- * @dev: device to supply
- * @id:  supply name or regulator ID
- *
- * Unregister an alias registered with
- * devm_regulator_register_supply_alias(). Normally this function
- * will not need to be called and the resource management code
- * will ensure that the resource is freed.
- */
-void devm_regulator_unregister_supply_alias(struct device *dev, const char *id)
+static void devm_regulator_unregister_supply_alias(struct device *dev,
+						   const char *id)
 {
 	struct regulator_supply_alias_match match;
 	int rc;
@@ -292,7 +281,6 @@ void devm_regulator_unregister_supply_alias(struct device *dev, const char *id)
 	if (rc != 0)
 		WARN_ON(rc);
 }
-EXPORT_SYMBOL_GPL(devm_regulator_unregister_supply_alias);
 
 /**
  * devm_regulator_bulk_register_supply_alias - Managed register

include/linux/regulator/consumer.h

@@ -222,8 +222,6 @@ void regulator_bulk_unregister_supply_alias(struct device *dev,
 int devm_regulator_register_supply_alias(struct device *dev, const char *id,
 					 struct device *alias_dev,
 					 const char *alias_id);
-void devm_regulator_unregister_supply_alias(struct device *dev,
-					    const char *id);
 
 int devm_regulator_bulk_register_supply_alias(struct device *dev,
 					      const char *const *id,
@@ -405,11 +403,6 @@ static inline int devm_regulator_register_supply_alias(struct device *dev,
 	return 0;
 }
 
-static inline void devm_regulator_unregister_supply_alias(struct device *dev,
-							  const char *id)
-{
-}
-
 static inline int devm_regulator_bulk_register_supply_alias(struct device *dev,
 						const char *const *id,
 						struct device *alias_dev,