fixes.
  sh64: mach-sim: Build fixes.
  sh64: mach-harp: Build fixes.
  sh64: Kill off duplicate frame pointer option.
  sh64: Kill off dead ROM-RAM and generic boards.
  sh64: Tidy up includes for Cayman board.
  sh64: Move *_p() I/O routine variants to io.h.
ÏKži•