9210 remove KMDB branch debugging support
9211 ::crregs could do with cr2/cr3 support
9209 ::ttrace should be able to filter by thread
Reviewed by: Patrick Mooney <patrick.mooney@joyent.com>
Reviewed by: Yuri Pankov <yuripv@yuripv.net>

*** 20,33 ****
   * CDDL HEADER END
   */
  /*
   * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
- #pragma ident   "%Z%%M% %I%     %E% SMI"
- 
  /*
   * isa-dependent portions of the kmdb target
   */
  
  #include <mdb/mdb_kreg_impl.h>
--- 20,33 ----
   * CDDL HEADER END
   */
  /*
   * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
+  *
+  * Copyright 2018 Joyent, Inc.
   */
  
  /*
   * isa-dependent portions of the kmdb target
   */
  
  #include <mdb/mdb_kreg_impl.h>
*** 375,391 ****
          }
  
          return (0);
  }
  
- /*ARGSUSED*/
- int
- kmt_step_branch(mdb_tgt_t *t)
- {
-         return (set_errno(EMDB_TGTHWNOTSUP));
- }
- 
  static const char *
  regno2name(int idx)
  {
          const mdb_tgt_regdesc_t *rd;
  
--- 375,384 ----