Convert OpcodeDecoder::Opcode and OpcodeDecoder::Primitive to enum class

Source/Core/VideoBackends/Software/SetupUnit.h

@@ -6,9 +6,14 @@
 #include "Common/CommonTypes.h"
 #include "VideoBackends/Software/NativeVertexFormat.h"
 
+namespace OpcodeDecoder
+{
+enum class Primitive : u8;
+}
+
 class SetupUnit
 {
-  u8 m_PrimType = 0;
+  OpcodeDecoder::Primitive m_PrimType{};
   int m_VertexCounter = 0;
 
   OutputVertexData m_Vertices[3];
@@ -24,7 +29,7 @@ class SetupUnit
   void SetupPoint();
 
 public:
-  void Init(u8 primitiveType);
+  void Init(OpcodeDecoder::Primitive primitive_type);
 
   OutputVertexData* GetVertex();