6464240 back out 6436930

[nore...@opensolaris.org]

Author: jb145095
Repository: /hg/onnv/onnv-gate
Revision: 675c3803df5da76bdebf4f6266198a93065a9d4e
Log message:
6464240 back out 6436930

Files:
        update: usr/src/uts/sun4v/io/qcn.c
        update: usr/src/uts/sun4v/sys/qcn.h