Add an ugly hack to disable DMA on the Tadpole SPARCLE laptop.  It doesn't work and this way we fall back on PIO which does work.  I'm pretty sure this is caused by bugs in our code, but I cannot find them.
Add an ugly hack to disable DMA on the Tadpole SPARCLE laptop.  It doesn't
work and this way we fall back on PIO which does work.  I'm pretty sure
this is caused by bugs in our code, but I cannot find them.

ok deraadt@, marco@

orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars