11630 remove checks for 64-bit capable hardware

@@ -34,102 +34,10 @@
 #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.
  *