PATCH: use UXA on default for pre-skylake intel GPUs

[matthew green <mrg%eterna.com.au@localhost>]

hi.


can folks who have issues with default setup and intel GPU
that were solved by switching to UXA, as well as anyone
else who didn't try that yet please try this patch?  i'm
hoping it can be a stop-gap for the recent issues..

   https://www.netbsd.org/~mrg/intel.uxa.older.diff

thanks.


.mrg.