[PD] don't use OSS I81x driver in full duplex!

[Miller Puckette]

Hi all,

I keep forgetting to mention this, but if you run Pd under RH 7.0 or 7.1
using an Intel i810 or i815, you should specify -noadc or -nodac or YOUR
SYSTEM WILL CRASH.  I think this only happens with OSS and not with ALSA;
I presume it's a driver bug but since i81x is so noisy it doesn't seem
worth chasing down.

cheers
Miller