TimingCPU: REPOST: Request::NO_ACCESS bypass in completeDataAccess
./cpu/simple/timing.cc: fix for x86 CDA microop
 - since CDA doesn't read or update memory, completeDataAccess needs to
   handle the case where the current status of the CPU is _status = Running
   caused by a request NO_ACCESS

Discarded previous review request (SIMPLE TIMING: when a request is NO_ACCESS (x86 CDA microinstruction), TimingSimpleCPU::completeDataAccess must still complete)