Improved GPU command lists decoding (#499)

* Better implementation of the DMA pusher, misc fixes

* Remove some debug code

* Correct RGBX8 format

* Add support for linked Texture Sampler Control

* Attempt to fix upside down screen issue

Ryujinx.Graphics/INvGpuEngine.cs

@@ -6,6 +6,6 @@ namespace Ryujinx.Graphics
     {
         int[] Registers { get; }
 
-        void CallMethod(NvGpuVmm Vmm, NvGpuPBEntry PBEntry);
+        void CallMethod(NvGpuVmm Vmm, GpuMethodCall MethCall);
     }
 }