kernel: Fix svcWaitSynch to always acquire requested wait objects.

src/core/hle/kernel/mutex.cpp

@@ -23,12 +23,7 @@ static void ResumeWaitingThread(Mutex* mutex) {
     // Reset mutex lock thread handle, nothing is waiting
     mutex->lock_count = 0;
     mutex->holding_thread = nullptr;
-
-    // Find the next waiting thread for the mutex...
-    auto next_thread = mutex->WakeupNextThread();
-    if (next_thread != nullptr) {
-        mutex->Acquire(next_thread);
-    }
+    mutex->WakeupAllWaitingThreads();
 }
 
 void ReleaseThreadMutexes(Thread* thread) {
@@ -94,8 +89,6 @@ void Mutex::Release() {
             ResumeWaitingThread(this);
         }
     }
-
-    HLE::Reschedule(__func__);
 }
 
 } // namespace