lgrp: getpolicy seg op has been around long enough
This special casing has been around for more than 10 years.  It's time for
it to go.  (There are no third party segment drivers anyway.)

*** 3499,3520 ****
   * Get memory allocation policy for this segment
   */
  lgrp_mem_policy_info_t *
  lgrp_mem_policy_get(struct seg *seg, caddr_t vaddr)
  {
-         extern struct seg_ops   segspt_ops;
-         extern struct seg_ops   segspt_shmops;
- 
-         /*
-          * This is for binary compatibility to protect against third party
-          * segment drivers which haven't recompiled to allow for
-          * segop_getpolicy()
-          */
-         if (seg->s_ops != &segvn_ops && seg->s_ops != &segspt_ops &&
-             seg->s_ops != &segspt_shmops)
-                 return (NULL);
- 
          return (segop_getpolicy(seg, vaddr));
  }
  
  /*
   * Set policy for allocating private memory given desired policy, policy info,
--- 3499,3508 ----