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/Services/Nv/NvMap/NvMapHandleParam.cs

@@ -0,0 +1,12 @@
+namespace Ryujinx.Core.OsHle.Services.Nv.NvMap
+{
+    enum NvMapHandleParam
+    {
+        Size  = 1,
+        Align = 2,
+        Base  = 3,
+        Heap  = 4,
+        Kind  = 5,
+        Compr = 6
+    }
+}