Merge pull request #6317 from ameerj/fps-fix

perf_stats: Rework FPS counter to be more accurate

src/video_core/renderer_vulkan/renderer_vulkan.cpp

@@ -154,6 +154,7 @@ void RendererVulkan::SwapBuffers(const Tegra::FramebufferConfig* framebuffer) {
         if (swapchain.Present(render_semaphore)) {
             blit_screen.Recreate();
         }
+        gpu.RendererFrameEndNotify();
         rasterizer.TickFrame();
     }