PowerPC: Add reservation monitor to save state

Source/Core/Core/PowerPC/PowerPC.cpp

@@ -125,6 +125,9 @@ void DoState(PointerWrap& p)
   p.Do(ppcState.pagetable_base);
   p.Do(ppcState.pagetable_hashmask);
 
+  p.Do(ppcState.reserve);
+  p.Do(ppcState.reserve_address);
+
   ppcState.iCache.DoState(p);
 
   if (p.GetMode() == PointerWrap::MODE_READ)

Source/Core/Core/PowerPC/PowerPC.h

@@ -167,8 +167,7 @@ struct PowerPCState
 
   InstructionCache iCache;
 
-  // TODO: These should really be in the save state, although it's unlikely to matter much.
-  // They are for lwarx and its friend stwcxd.
+  // Reservation monitor for lwarx and its friend stwcxd.
   bool reserve;
   u32 reserve_address;