[mythtv] CUDA Code for nvidia cards

[Daniel Kristjansson]

<snip>
> It's really nothing new, I wrote some fancy rendering code using that
> stuff in the late 1990's, but of course back then it only worked on
> 5xxx nVidia cards and the pseudo C often failed and had to be replaced
<snip>

As someone pointed out to me, I was working with an emulator and then
a 4xxx back then, not a 5xxx card.. I'm was thinking of a later project
with a 5xxx card.. the tech really did come to fruition on the 5xxx
series though. :)

-- Daniel