XXX AVX procfs

*** 254,268 ****
          case PIOCMAXSIG:
          case PIOCGXREGSIZE:
                  break;
          case PIOCSXREG:         /* set extra registers */
          case PIOCGXREG:         /* get extra registers */
- #if defined(__sparc)
                  thingsize = sizeof (prxregset_t);
- #else
-                 thingsize = 0;
- #endif
                  break;
          case PIOCACTION:
                  thingsize = (nsig-1) * sizeof (struct sigaction);
                  break;
          case PIOCGHOLD:
--- 254,264 ----