make Dblqh use OM_AUTO_SYNC


storage/ndb/include/kernel/signaldata/FsOpenReq.hpp:
  make Dblqh us OM_AUTO_SYNC
storage/ndb/src/kernel/blocks/dblqh/Dblqh.hpp:
  make Dblqh us OM_AUTO_SYNC
storage/ndb/src/kernel/blocks/dblqh/DblqhMain.cpp:
  make Dblqh us OM_AUTO_SYNC
storage/ndb/src/kernel/vm/pc.hpp:
  remove unused #defines