Copy stable/9 to releng/9.3 as part of the 9.3-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Copy head to stable/9 as part of 9.0-RELEASE release cycle.

Approved by: re (implicit)

o) Set MAC addresses starting at the MAC base for all management ports, not
just the MR-730.
o) Start MAC addresses for the non-management ports after the management ports.

Submitted by: Bhanu Prakash (with modifications)

The Lanner MR-730 uses the first two MACs at its MAC base for the 10/100
management ports, and gigabit ports start at an offset of 2 from the MAC
base.

Count output bytes and packets.

o) Free mbufs in error cases.
o) Clear/acknowledge receive interrupt at end of thread. This gives the
management interfaces performance on the order of 100Mbps rather than
the previous level of 10Mbps on my MR-730.

o) Expand the CIU driver to be aware of newly-allocated parts of the IRQ range.
o) Add 'octm', a trivial driver for the 10/100 management ports found on some
Octeon systems.
o) Make the Simple Executive's management port helper routines compile on
FreeBSD (namely by not doing math on void pointers.)
o) Add a cvmx_mgmt_port_sendm routine to the Simple Executive to send an mbuf
so there is only one copy in the transmit path, rather than having to first
copy the mbuf to an intermediate buffer and then copy that to the Simple
Executive's transmit ring.
o) Properly work out MII addresses of management ports on the Lanner MR-730.
XXX The MR-730 also needs some patches to the MII read/write routines, but
this is sufficient for now. Media detection will be fixed in the future
when I can spend more time reading the vendor-supplied patches.