cpu: fix a switching issue with the o3 cpu.

This change fixes the switcheroo test that broke earlier this month. The code
that was checking for the pipeline being blocked wasn't checking for a pending
translation, only for a icache access.

src/cpu/o3/fetch_impl.hh

@@ -1049,7 +1049,8 @@ DefaultFetch<Impl>::checkSignalsAndUpdate(ThreadID tid)
  if (checkStall(tid) &&
  fetchStatus[tid] != IcacheWaitResponse &&
  fetchStatus[tid] != IcacheWaitRetry &&
- fetchStatus[tid] != ItlbWait) {
+ fetchStatus[tid] != ItlbWait &&
+ fetchStatus[tid] != QuiescePending) {
  DPRINTF(Fetch, "[tid:%i]: Setting to blocked\n",tid);
 
  fetchStatus[tid] = Blocked;