General packing of structs

Get back some memory/cachelines by packing any leftover static fields together.

Signed-off-by: Kozlowski Mateusz <mateusz.kozlowski@intel.com>

src/concurrency/ocf_cache_line_concurrency.c

@@ -37,8 +37,8 @@
 
 struct __waiter {
 	ocf_cache_line_t line;
-	void *ctx;
 	uint32_t ctx_id;
+	void *ctx;
 	ocf_req_async_lock_cb cb;
 	struct list_head item;
 	int rw;