interconnect: Make icc_provider_del() return void

All users ignore the return value of icc_provider_del(). Consequently
make it not return an error code.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/20220718121409.171773-8-u.kleine-koenig@pengutronix.deSigned-off-by: Georgi Djakov <djakov@kernel.org>

drivers/interconnect/core.c

@@ -1057,29 +1057,25 @@ EXPORT_SYMBOL_GPL(icc_provider_add);
 /**
  * icc_provider_del() - delete previously added interconnect provider
  * @provider: the interconnect provider that will be removed from topology
- *
- * Return: 0 on success, or an error code otherwise
  */
-int icc_provider_del(struct icc_provider *provider)
+void icc_provider_del(struct icc_provider *provider)
 {
 	mutex_lock(&icc_lock);
 	if (provider->users) {
 		pr_warn("interconnect provider still has %d users\n",
 			provider->users);
 		mutex_unlock(&icc_lock);
-		return -EBUSY;
+		return;
 	}
 
 	if (!list_empty(&provider->nodes)) {
 		pr_warn("interconnect provider still has nodes\n");
 		mutex_unlock(&icc_lock);
-		return -EBUSY;
+		return;
 	}
 
 	list_del(&provider->provider_list);
 	mutex_unlock(&icc_lock);
-
-	return 0;
 }
 EXPORT_SYMBOL_GPL(icc_provider_del);
 

include/linux/interconnect-provider.h

@@ -123,7 +123,7 @@ void icc_node_add(struct icc_node *node, struct icc_provider *provider);
 void icc_node_del(struct icc_node *node);
 int icc_nodes_remove(struct icc_provider *provider);
 int icc_provider_add(struct icc_provider *provider);
-int icc_provider_del(struct icc_provider *provider);
+void icc_provider_del(struct icc_provider *provider);
 struct icc_node_data *of_icc_get_from_provider(struct of_phandle_args *spec);
 void icc_sync_state(struct device *dev);
 
@@ -172,9 +172,8 @@ static inline int icc_provider_add(struct icc_provider *provider)
 	return -ENOTSUPP;
 }
 
-static inline int icc_provider_del(struct icc_provider *provider)
+static inline void icc_provider_del(struct icc_provider *provider)
 {
-	return -ENOTSUPP;
 }
 
 static inline struct icc_node_data *of_icc_get_from_provider(struct of_phandle_args *spec)