Correct capture of PoolInfo::allocable_size_.

Change-Id: I80757bb36048bc15b928220aca0a1eb5d898ab22

rocrtst/suites/performance/memory_async_copy.h

@@ -112,7 +112,7 @@ class PoolInfo {
       segment_ = segment;
       is_fine_grained_ = is_fine_grained;
       size_ = size;
-      allocable_size_ = size;
+      allocable_size_ = max_alloc_size;
       owner_agent_info_ = agent_info;
     }
     PoolInfo() {}