FrameLimiting: Enable frame limiting for single core.

src/core/hle/service/nvdrv/devices/nvdisp_disp0.cpp

@@ -41,6 +41,7 @@ void nvdisp_disp0::flip(u32 buffer_handle, u32 offset, u32 format, u32 width, u3
     system.GetPerfStats().EndGameFrame();
     system.GetPerfStats().EndSystemFrame();
     system.GPU().SwapBuffers(&framebuffer);
+    system.FrameLimiter().DoFrameLimiting(system.CoreTiming().GetGlobalTimeUs());
     system.GetPerfStats().BeginSystemFrame();
 }
 

src/core/perf_stats.cpp

@@ -119,7 +119,7 @@ double PerfStats::GetLastFrameTimeScale() {
 }
 
 void FrameLimiter::DoFrameLimiting(microseconds current_system_time_us) {
-    if (!Settings::values.use_frame_limit) {
+    if (!Settings::values.use_frame_limit || Settings::values.use_multi_core) {
         return;
     }