Fix wrong face culling once and for all (#1277)

* Viewport swizzle support on NV and clip origin

* Initialize default viewport swizzle state, emulate viewport swizzle on shaders when not supported

* Address PR feedback

Ryujinx.Graphics.GAL/ViewportSwizzle.cs

@@ -2,13 +2,15 @@ namespace Ryujinx.Graphics.GAL
 {
     public enum ViewportSwizzle
     {
-        PositiveX,
-        NegativeX,
-        PositiveY,
-        NegativeY,
-        PositiveZ,
-        NegativeZ,
-        PositiveW,
-        NegativeW
+        PositiveX = 0,
+        NegativeX = 1,
+        PositiveY = 2,
+        NegativeY = 3,
+        PositiveZ = 4,
+        NegativeZ = 5,
+        PositiveW = 6,
+        NegativeW = 7,
+
+        NegativeFlag = 1
     }
 }