11630 remove checks for 64-bit capable hardware

*** 34,135 ****
  #include <sys/salib.h>
  
  extern int is_sun4v;
  
  /*
-  * Check if the CPU should default to 64-bit or not.
-  * UltraSPARC-1's default to 32-bit mode.
-  * Everything else defaults to 64-bit mode.
-  */
- 
- /*
-  * Manufacturer codes for the CPUs we're interested in
-  */
- #define TI_JEDEC        0x17
- #define SUNW_JEDEC      0x22
- 
- /*
-  * Implementation codes for the CPUs we're interested in
-  */
- #define IMPL_US_I       0x10
- 
- static pnode_t
- visit(pnode_t node)
- {
-         int impl, manu;
-         char name[32];
-         static char ultrasparc[] = "SUNW,UltraSPARC";
-         static char implementation[] = "implementation#";
-         static char manufacturer[] = "manufacturer#";
- 
-         /*
-          * if name isn't 'SUNW,UltraSPARC', continue.
-          */
-         if (prom_getproplen(node, "name") != sizeof (ultrasparc))
-                 return ((pnode_t)0);
-         (void) prom_getprop(node, "name", name);
-         if (strncmp(name, ultrasparc, sizeof (ultrasparc)) != 0)
-                 return ((pnode_t)0);
- 
-         if (prom_getproplen(node, manufacturer) != sizeof (int))
-                 return ((pnode_t)0);
-         (void) prom_getprop(node, manufacturer, (caddr_t)&manu);
- 
-         if ((manu != SUNW_JEDEC) && (manu != TI_JEDEC))
-                 return ((pnode_t)0);
- 
-         if (prom_getproplen(node, implementation) != sizeof (int))
-                 return ((pnode_t)0);
-         (void) prom_getprop(node, implementation, (caddr_t)&impl);
- 
-         if (impl != IMPL_US_I)
-                 return ((pnode_t)0);
- 
-         return (node);
- }
- 
- /*
-  * visit each node in the device tree, until we get a non-null answer
-  */
- static pnode_t
- walk(pnode_t node)
- {
-         pnode_t id;
- 
-         if (visit(node))
-                 return (node);
- 
-         for (node = prom_childnode(node); node; node = prom_nextnode(node))
-                 if ((id = walk(node)) != (pnode_t)0)
-                         return (id);
- 
-         return ((pnode_t)0);
- }
- 
- /*
-  * Check if the CPU is an UltraSPARC-1 or not.
-  */
- int
- cpu_is_ultrasparc_1(void)
- {
-         static int cpu_checked;
-         static int cpu_default;
- 
-         /*
-          * If we already checked or the machine is
-          * a sun4v, we already know the answer.
-          */
-         if (!is_sun4v || cpu_checked == 0) {
-                 if (walk(prom_rootnode()))
-                         cpu_default = 1;
-                 cpu_checked = 1;
-         }
- 
-         return (cpu_default);
- }
- 
- /*
   * Retain a page or reclaim a previously retained page of physical
   * memory for use by the prom upgrade. If successful, leave
   * an indication that a page was retained by creating a boolean
   * property in the root node.
   *
--- 34,43 ----