fermi_2d: Lower surface copy log severity to DEBUG

src/video_core/engines/fermi_2d.cpp

@@ -29,7 +29,7 @@ void Fermi2D::CallMethod(const GPU::MethodCall& method_call) {
 }
 
 void Fermi2D::HandleSurfaceCopy() {
-    LOG_WARNING(HW_GPU, "Requested a surface copy with operation {}",
+    LOG_DEBUG(HW_GPU, "Requested a surface copy with operation {}",
                 static_cast<u32>(regs.operation));
 
     // TODO(Subv): Only raw copies are implemented.