AMD microcode updates.

[Colin Ian King]

Hi,

I think we should consider supporting AMD microcode updates for Natty.
The kernel microcode driver is able to load the AMD microcode file
automatically from /lib/firmware/amd-ucode/microcode_amd.bin when the
module is loaded using the firmware loading infrastructure, so we don't
need to mess around with user space tools like the Intel microcode_ctl·

The microcode is available at:
http://www.amd64.org/support/microcode.html (tarball at:
http://www.amd64.org/index.php?id=50&file=amd-ucode-latest.tar)

The caveat is we need some careful inspection of the Software License
Agreement.

Colin