Kernel/IPC: Add a small delay after each SyncRequest to prevent thread starvation.

Ported from citra PR #3091

The delay specified here is from a Nintendo 3DS, and should be measured in a Nintendo Switch.

This change is enough to prevent Puyo Puyo Tetris's main thread starvation.

src/core/hle/kernel/thread.cpp

@@ -284,6 +284,7 @@ void Thread::ResumeFromWait() {
     case THREADSTATUS_WAIT_SYNCH_ANY:
     case THREADSTATUS_WAIT_ARB:
     case THREADSTATUS_WAIT_SLEEP:
+    case THREADSTATUS_WAIT_IPC:
         break;
 
     case THREADSTATUS_READY: