OS-2366 ddi_periodic_add(9F) is entirely rubbish

*** 56,66 ****
  #include <sys/sunndi.h>
  #include <sys/kstat.h>
  #include <sys/conf.h>
  #include <sys/ddi_impldefs.h>   /* include implementation structure defs */
  #include <sys/ndi_impldefs.h>   /* include prototypes */
! #include <sys/ddi_timer.h>
  #include <sys/hwconf.h>
  #include <sys/pathname.h>
  #include <sys/modctl.h>
  #include <sys/epm.h>
  #include <sys/devctl.h>
--- 56,66 ----
  #include <sys/sunndi.h>
  #include <sys/kstat.h>
  #include <sys/conf.h>
  #include <sys/ddi_impldefs.h>   /* include implementation structure defs */
  #include <sys/ndi_impldefs.h>   /* include prototypes */
! #include <sys/ddi_periodic.h>
  #include <sys/hwconf.h>
  #include <sys/pathname.h>
  #include <sys/modctl.h>
  #include <sys/epm.h>
  #include <sys/devctl.h>