Fix updating hot cachelines cleaning list

Update cacheline's timestamp each time it's being written.

Signed-off-by: Michal Mielewczyk <michal.mielewczyk@intel.com>

src/utils/utils_request.h

@@ -0,0 +1,13 @@
+/*
+ * Copyright(c) 2012-2021 Intel Corporation
+ * SPDX-License-Identifier: BSD-3-Clause-Clear
+ */
+
+#include "../ocf_request.h"
+#include "../ocf_cache_priv.h"
+
+typedef int (*ocf_req_actor_t)(struct ocf_request *req, uint32_t map_idx);
+
+int ocf_req_actor(struct ocf_request *req, ocf_req_actor_t actor);
+
+void ocf_req_set_cleaning_hot(struct ocf_request *req);