Additional cleaning policy info outside of the SB

Starting cache in a standby mode requires access to a valid cleaning policy
type. If the policy is stored only in the superblock, it may be overridden by
one of the metadata passive updates.

To prevent losing the information it should be stored in cache's runtime
metadata.

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

src/mngt/ocf_mngt_common.h

@@ -30,4 +30,7 @@ void ocf_mngt_cache_lock_deinit(ocf_cache_t cache);
 
 bool ocf_mngt_cache_is_locked(ocf_cache_t cache);
 
+void __set_cleaning_policy(ocf_cache_t cache,
+		ocf_cleaning_t new_cleaning_policy);
+
 #endif /* __OCF_MNGT_COMMON_H__ */