svc: Improve SleepThread for yield types.

- Fixes Super Mario Party.

src/core/hle/kernel/svc.cpp

@@ -770,12 +770,24 @@ static void ExitThread() {
 
 /// Sleep the current thread
 static void SleepThread(s64 nanoseconds) {
-    LOG_TRACE(Kernel_SVC, "called nanoseconds={}", nanoseconds);
+    LOG_DEBUG(Kernel_SVC, "called nanoseconds={}", nanoseconds);
 
-    // Don't attempt to yield execution if there are no available threads to run,
-    // this way we avoid a useless reschedule to the idle thread.
-    if (nanoseconds == 0 && !Core::System::GetInstance().CurrentScheduler().HaveReadyThreads())
+    if (nanoseconds == 0) {
+        // Yield type 0 is just a yield without load balancing
+        Core::System::GetInstance().CpuCore(0).PrepareReschedule();
+        Core::System::GetInstance().CpuCore(1).PrepareReschedule();
+        Core::System::GetInstance().CpuCore(2).PrepareReschedule();
+        Core::System::GetInstance().CpuCore(3).PrepareReschedule();
         return;
+    }
+
+    if (nanoseconds < 0) {
+        UNIMPLEMENTED_MSG("unimplemented yield type");
+
+        // TODO(bunnei): Implement the various load balancing yield types here. This will force a
+        // reschedule, but is incorrect.
+        nanoseconds = 0;
+    }
 
     // Sleep current thread and check for next thread to schedule
     WaitCurrentThread_Sleep();
@@ -783,7 +795,10 @@ static void SleepThread(s64 nanoseconds) {
     // Create an event to wake the thread up after the specified nanosecond delay has passed
     GetCurrentThread()->WakeAfterDelay(nanoseconds);
 
-    Core::System::GetInstance().PrepareReschedule();
+    Core::System::GetInstance().CpuCore(0).PrepareReschedule();
+    Core::System::GetInstance().CpuCore(1).PrepareReschedule();
+    Core::System::GetInstance().CpuCore(2).PrepareReschedule();
+    Core::System::GetInstance().CpuCore(3).PrepareReschedule();
 }
 
 /// Wait process wide key atomic