OS-2366 ddi_periodic_add(9F) is entirely rubbish (MORE)

*** 116,126 ****
  #include <sys/cpc_impl.h>
  #include <sys/cpu_module.h>
  #include <sys/smbios.h>
  #include <sys/debug_info.h>
  #include <sys/bootinfo.h>
! #include <sys/ddi_timer.h>
  #include <sys/systeminfo.h>
  #include <sys/multiboot.h>
  
  #ifdef  __xpv
  
--- 116,126 ----
  #include <sys/cpc_impl.h>
  #include <sys/cpu_module.h>
  #include <sys/smbios.h>
  #include <sys/debug_info.h>
  #include <sys/bootinfo.h>
! #include <sys/ddi_periodic.h>
  #include <sys/systeminfo.h>
  #include <sys/multiboot.h>
  
  #ifdef  __xpv
  
*** 2247,2261 ****
          /*
           * Register software interrupt handlers for ddi_periodic_add(9F).
           * Software interrupts up to the level 10 are supported.
           */
          for (i = DDI_IPL_1; i <= DDI_IPL_10; i++) {
-                 /*
-                  * The constant string "ddi_periodic", below, is only used to
-                  * print debugging information.  Generating a dynamic string
-                  * for each soft level is a waste of kernel memory.
-                  */
                  (void) add_avsoftintr((void *)&softlevel_hdl[i-1], i,
                      (avfunc)ddi_periodic_softintr, "ddi_periodic",
                      (caddr_t)(uintptr_t)i, NULL);
          }
  
--- 2247,2256 ----