11630 remove checks for 64-bit capable hardware

*** 20,36 ****
   */
  
  /*
   * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
  #ifndef _SYS_PROMIF_H
  #define _SYS_PROMIF_H
  
- #pragma ident   "%Z%%M% %I%     %E% SMI"
- 
  #include <sys/types.h>
  #include <sys/obpdefs.h>
  
  #if defined(_KERNEL) || defined(_KMDB)
  #include <sys/va_list.h>
--- 20,35 ----
   */
  
  /*
   * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
+  * Copyright 2019 Peter Tribble.
   */
  
  #ifndef _SYS_PROMIF_H
  #define _SYS_PROMIF_H
  
  #include <sys/types.h>
  #include <sys/obpdefs.h>
  
  #if defined(_KERNEL) || defined(_KMDB)
  #include <sys/va_list.h>
*** 183,193 ****
  
  extern  int             prom_getversion(void);
  extern  int             prom_is_openprom(void);
  extern  int             prom_is_p1275(void);
  extern  int             prom_version_name(char *buf, int buflen);
- extern  int             prom_version_check(char *buf, size_t len, pnode_t *n);
  
  extern  void            *prom_mon_id(void);     /* SMCC/OBP platform centric */
  
  extern  uint_t          prom_gettime(void);
  
--- 182,191 ----
*** 197,220 ****
  extern  void            prom_interpret(char *str, uintptr_t arg1,
                              uintptr_t arg2, uintptr_t arg3, uintptr_t arg4,
                              uintptr_t arg5);
  
  /*
-  * Return code values from prom_version_check:
-  *
-  * This routine uses past-prediction mode to determine if the firmware
-  * on the current system is 64-bit ready.
-  *
-  * return code 2 could happen on a board-based server with a slave CPU board
-  * running down-rev firmware and the current master running adequate fw.
-  */
- #define PROM_VER64_OK           0       /* Prom is 64-bit ready (or n/a) */
- #define PROM_VER64_UPGRADE      1       /* Down-rev firmware is running */
- #define PROM_VER64_SUGGEST      2       /* Down-rev firmware detected .. */
-                                         /* .. but not currently active */
- 
- /*
   * Administrative group: OBP only.
   */
  extern  int             prom_sethandler(void (*v0_func)(), void (*v2_func)());
  
  extern  struct bootparam *prom_bootparam(void);
--- 195,204 ----