ARM exclusive monitor and multicore fixes (#589)

* Implement ARM exclusive load/store with compare exchange insts, and enable multicore by default

* Fix comment typo

* Support Linux and OSX on MemoryAlloc and CompareExchange128, some cleanup

* Use intel syntax on assembly code

* Adjust identation

* Add CPUID check and fix exclusive reservation granule size

* Update schema multicore scheduling default value

* Make the cpu id check code lower case aswell

Ryujinx.HLE/HOS/Kernel/Threading/KCoreContext.cs

@@ -70,8 +70,6 @@ namespace Ryujinx.HLE.HOS.Kernel.Threading
                 CurrentThread.TotalTimeRunning += currentTime - CurrentThread.LastScheduledTime;
                 CurrentThread.LastScheduledTime = currentTime;
 
-                CurrentThread.ClearExclusive();
-
                 _coreManager.Set(CurrentThread.Context.Work);
 
                 CurrentThread.Context.Execute();