5302 vm: remove 'nopageage' static global

*** 77,88 ****
  #include <sys/vm_usage.h>
  #include <fs/fs_subr.h>
  #include <sys/ddi.h>
  #include <sys/modctl.h>
  
- static int nopageage = 0;
- 
  static pgcnt_t max_page_get;    /* max page_get request size in pages */
  pgcnt_t total_pages = 0;        /* total number of pages (used by /proc) */
  
  /*
   * freemem_lock protects all freemem variables:
--- 77,86 ----
*** 2689,2699 ****
                  TRACE_1(TR_FAC_VM, TR_PAGE_FREE_FREE,
                      "page_free_free:pp %p", pp);
          } else {
                  PP_CLRAGED(pp);
  
!                 if (!dontneed || nopageage) {
                          /* move it to the tail of the list */
                          page_list_add(pp, PG_CACHE_LIST | PG_LIST_TAIL);
  
                          VM_STAT_ADD(pagecnt.pc_free_cache);
                          TRACE_1(TR_FAC_VM, TR_PAGE_FREE_CACHE_TAIL,
--- 2687,2697 ----
                  TRACE_1(TR_FAC_VM, TR_PAGE_FREE_FREE,
                      "page_free_free:pp %p", pp);
          } else {
                  PP_CLRAGED(pp);
  
!                 if (!dontneed) {
                          /* move it to the tail of the list */
                          page_list_add(pp, PG_CACHE_LIST | PG_LIST_TAIL);
  
                          VM_STAT_ADD(pagecnt.pc_free_cache);
                          TRACE_1(TR_FAC_VM, TR_PAGE_FREE_CACHE_TAIL,