Use cline concurrency ctx instead of cache

Cacheline concurrency functions have their interface changed
so that the cacheline concurrency private context is
explicitly on the parameter list, rather than being taken
from cache->device->concurrency.cache_line.

Cache pointer is no longer provided as a parameter to these
functions. Cacheline concurrency context now has a pointer
to cache structure (for logging purposes only).

The purpose of this change is to facilitate unit testing.

Signed-off-by: Adam Rutkowski <adam.j.rutkowski@intel.com>

src/engine/engine_zero.c

@@ -31,7 +31,7 @@ static int ocf_zero_purge(struct ocf_request *req)
 		ocf_hb_req_prot_unlock_wr(req); /*- END Metadata WR access ---------*/
 	}
 
-	ocf_req_unlock_wr(req);
+	ocf_req_unlock_wr(req->cache->device->concurrency.cache_line, req);
 
 	req->complete(req, req->error);
 
@@ -152,7 +152,9 @@ void ocf_engine_zero_line(struct ocf_request *req)
 	req->io_if = &_io_if_ocf_zero_do;
 
 	/* Some cache line are mapped, lock request for WRITE access */
-	lock = ocf_req_async_lock_wr(req, ocf_engine_on_resume);
+	lock = ocf_req_async_lock_wr(
+			req->cache->device->concurrency.cache_line,
+			req, ocf_engine_on_resume);
 
 	if (lock >= 0) {
 		ENV_BUG_ON(lock != OCF_LOCK_ACQUIRED);