Updated mythtv-fixes port

[Geoff Buckingham]

On Sat, Mar 24, 2007 at 02:55:58PM +0100, Alexander Leidinger wrote:
> 
> Why not add a configure option to allow to hardwire to a specific CPU?
> 
> There's also "sysctl hw.model", but it may not work everywhere. The
> configure-option is a much better fallback.
> 
hw.model looks interesting, I had looked through sysctl for something to
use but was looking for cpu or processor :-)

The CPU detection only gets used if the mythtv configure isn't given the 
relevent arguments. It should be possible to get the port's makefile
to add these if required.

I was going to ry and get an vidia XVMC option working next. May switch to
hw.model then although, ideally we shoul have a way to find "features" like
MMX.
(The Myth TV configure seems to both try to detect them, and in other cases
assume fetures based on Model Name.)