6789869 hxge needs to use rdc mailbox for rcr qlen and rcr tail whenever possible

[michael.sp...@sun.com]

Author: Michael Speer <Michael.Speer at Sun.COM>
Repository: /hg/onnv/onnv-gate
Latest revision: 66c6397b4b022a8e75a80c1f8a1f0e9e3a20dbc6
Total changesets: 1
Log message:
6789869 hxge needs to use rdc mailbox for rcr qlen and rcr tail whenever 
possible
6784810 Blades got hung during MAXQ tests

Files:
        update: usr/src/uts/common/io/hxge/hxge_rxdma.c
        update: usr/src/uts/common/io/hxge/hxge_send.c
        update: usr/src/uts/common/io/hxge/hxge_txdma.c
        update: usr/src/uts/common/io/hxge/hxge_txdma.h