soc: qcom: rpmh: Update rpmh_invalidate function to return void

Currently rpmh_invalidate() always returns success. Update its
return type to void.

Reviewed-by: Lina Iyer <[e-mail]>
Reviewed-by: Stephen Boyd <[e-mail]>
Suggested-by: Stephen Boyd <[e-mail]>
Signed-off-by: Maulik Shah <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Bjorn Andersson <[e-mail]>

drivers/interconnect/qcom/bcm-voter.c

···
 	if (!commit_idx[0])
 		goto out;
 
-	ret = rpmh_invalidate(voter->dev);
-	if (ret) {
-		pr_err("Error invalidating RPMH client (%d)\n", ret);
-		goto out;
-	}
+	rpmh_invalidate(voter->dev);
 
 	ret = rpmh_write_batch(voter->dev, RPMH_ACTIVE_ONLY_STATE,
 			       cmds, commit_idx);

drivers/soc/qcom/rpmh.c

···
  *
  * Invalidate the sleep and wake values in batch_cache.
  */
-int rpmh_invalidate(const struct device *dev)
+void rpmh_invalidate(const struct device *dev)
 {
 	struct rpmh_ctrlr *ctrlr = get_rpmh_ctrlr(dev);
 	struct batch_cache_req *req, *tmp;
···
 	INIT_LIST_HEAD(&ctrlr->batch_cache);
 	ctrlr->dirty = true;
 	spin_unlock_irqrestore(&ctrlr->cache_lock, flags);
-
-	return 0;
 }
 EXPORT_SYMBOL(rpmh_invalidate);

include/soc/qcom/rpmh.h

···
 int rpmh_write_batch(const struct device *dev, enum rpmh_state state,
 		     const struct tcs_cmd *cmd, u32 *n);
 
-int rpmh_invalidate(const struct device *dev);
+void rpmh_invalidate(const struct device *dev);
 
 #else
 
···
 				   const struct tcs_cmd *cmd, u32 *n)
 { return -ENODEV; }
 
-static inline int rpmh_invalidate(const struct device *dev)
-{ return -ENODEV; }
+static inline void rpmh_invalidate(const struct device *dev)
+{
+}
 
 #endif /* CONFIG_QCOM_RPMH */