6440742 mdb's ::step over is broken for amd64 register-indirect calls

[dan.m...@sun.com]

Author: dmick
Repository: /hg/onnv/onnv-gate
Revision: 69d1a6d9f726732c383889e3fc7facd84dc812dd
Log message:
6440742 mdb's ::step over is broken for amd64 register-indirect calls

Files:
        update: usr/src/cmd/mdb/intel/mdb/mdb_amd64util.c