2976 remove useless offsetof() macros

*** 50,61 ****
  #include <sys/utsname.h>
  #include <sys/systeminfo.h>
  #include <sys/ddi.h>
  #include <sys/time.h>
  #include <sys/promif.h>
  
- #define offsetof(s, m)  (size_t)(&(((s *)0)->m))
  #define RMCRESBUFLEN    1024
  #define DATE_TIME_MSG_SIZE      78
  #define RMCLOMV_WATCHDOG_MODE   "rmclomv-watchdog-mode"
  #define DELAY_TIME      5000000  /* 5 seconds, in microseconds */
  #define CPU_SIGNATURE_DELAY_TIME        5000000  /* 5 secs, in microsecs */
--- 50,61 ----
  #include <sys/utsname.h>
  #include <sys/systeminfo.h>
  #include <sys/ddi.h>
  #include <sys/time.h>
  #include <sys/promif.h>
+ #include <sys/sysmacros.h>
  
  #define RMCRESBUFLEN    1024
  #define DATE_TIME_MSG_SIZE      78
  #define RMCLOMV_WATCHDOG_MODE   "rmclomv-watchdog-mode"
  #define DELAY_TIME      5000000  /* 5 seconds, in microseconds */
  #define CPU_SIGNATURE_DELAY_TIME        5000000  /* 5 secs, in microsecs */