Fix compile problem by changing 'stp_for_each_cpu' to 'for_each_possible_cpu'.

Fix compile problem by changing 'stp_for_each_cpu' to 'for_each_possible_cpu'.

* runtime/runtime.h: Removed stp_for_each_cpu() macro definition, since no
  longer needed (and 'cpu_possible_map' has been removed from the upstream
  kernel).
* runtime/map-stat.c: Replaced 'stp_for_each_cpu()' with
  'for_each_possible_cpu()'.
* runtime/map.c: Ditto.
* runtime/perf.c: Ditto.
* runtime/pmap-gen.c: Ditto.
* runtime/stat.c: Ditto.
* runtime/transport/procfs.c: Ditto.
* translate.cxx: Ditto.