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/Gpu/LinearSwizzle.cs

@@ -0,0 +1,19 @@
+namespace Ryujinx.Core.Gpu
+{
+    class LinearSwizzle : ISwizzle
+    {
+        private int Pitch;
+        private int Bpp;
+
+        public LinearSwizzle(int Pitch, int Bpp)
+        {
+            this.Pitch = Pitch;
+            this.Bpp   = Bpp;
+        }
+
+        public int GetSwizzleOffset(int X, int Y)
+        {
+            return X * Bpp + Y * Pitch;
+        }
+    }
+}