RDMA/iwcm: Change the return type of iwcm_deref_id()

Since iwcm_deref_id() returns either 0 or 1, change its return type from
'int' into 'bool'.
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20240605145117.397751-3-bvanassche@acm.orgReviewed-by: Zhu Yanjun <yanjun.zhu@linux.dev>
Signed-off-by: Leon Romanovsky <leon@kernel.org>

drivers/infiniband/core/iwcm.c

@@ -206,17 +206,17 @@ static void free_cm_id(struct iwcm_id_private *cm_id_priv)
 
 /*
  * Release a reference on cm_id. If the last reference is being
- * released, free the cm_id and return 1.
+ * released, free the cm_id and return 'true'.
  */
-static int iwcm_deref_id(struct iwcm_id_private *cm_id_priv)
+static bool iwcm_deref_id(struct iwcm_id_private *cm_id_priv)
 {
 	if (refcount_dec_and_test(&cm_id_priv->refcount)) {
 		BUG_ON(!list_empty(&cm_id_priv->work_list));
 		free_cm_id(cm_id_priv);
-		return 1;
+		return true;
 	}
 
-	return 0;
+	return false;
 }
 
 static void add_ref(struct iw_cm_id *cm_id)