6748924 fix lint warnings in putback for 6747701

[vikram.he...@sun.com]

Author: Vikram Hegde <Vikram.Hegde at Sun.COM>
Repository: /hg/onnv/onnv-gate
Latest revision: 1e2a36b9653773be5ef520f6347d146a0aab6498
Total changesets: 1
Log message:
6748924 fix lint warnings in putback for 6747701

Files:
        update: usr/src/uts/i86pc/io/rootnex.c