spu: Clean up asmjit - avoid touching the shared db whenever possible

- Gets around the locking issues when fetching from the shared db

rpcs3/Emu/Cell/SPUThread.h

@@ -582,6 +582,7 @@ public:
 
 	std::exception_ptr pending_exception;
 
+	std::array<std::shared_ptr<struct spu_function_t>, 65536> compiled_cache;
 	std::shared_ptr<class SPUDatabase> spu_db;
 	std::shared_ptr<class spu_recompiler_base> spu_rec;
 	u32 recursion_level = 0;