Revert r158679 - use case is unclear (and it increases the memory footprint).

Original commit message:
    Allow up to 64 functional units per processor itinerary.

    This patch changes the type used to hold the FU bitset from unsigned to uint64_t.
    This will be needed for some upcoming PowerPC itineraries.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@159027 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/CellSPU/SPUNopFiller.cpp b/lib/Target/CellSPU/SPUNopFiller.cpp
index 1509597..7c58041 100644
--- a/lib/Target/CellSPU/SPUNopFiller.cpp
+++ b/lib/Target/CellSPU/SPUNopFiller.cpp
@@ -138,7 +138,7 @@
 SPUNopFiller::getOpPlacement( MachineInstr &instr ) {
   int sc = instr.getDesc().getSchedClass();
   const InstrStage *stage = IID->beginStage(sc);
-  uint64_t FUs = stage->getUnits();
+  unsigned FUs = stage->getUnits();
   SPUOpPlace retval;
 
   switch( FUs ) {