NvServices refactoring (#120)

* Initial implementation of NvMap/NvHostCtrl

* More work on NvHostCtrl

* Refactoring of nvservices, move GPU Vmm, make Vmm per-process, refactor most gpu devices, move Gpu to Core, fix CbBind

* Implement GetGpuTime, support CancelSynchronization, fix issue on InsertWaitingMutex, proper double buffering support (again, not working properly for commercial games, only hb)

* Try to fix perf regression reading/writing textures, moved syncpts and events to a UserCtx class, delete global state when the process exits, other minor tweaks

* Remove now unused code, add comment about probably wrong result codes

Ryujinx.Core/OsHle/Utilities/IntUtils.cs

@@ -0,0 +1,15 @@
+namespace Ryujinx.Core.OsHle.Utilities
+{
+    static class IntUtils
+    {
+        public static int RoundUp(int Value, int Size)
+        {
+            return (Value + (Size - 1)) & ~(Size - 1);
+        }
+
+        public static long RoundUp(long Value, int Size)
+        {
+            return (Value + (Size - 1)) & ~((long)Size - 1);
+        }
+    }
+}