kern/121720: [wpi] wpi doesnt work if kernel has options SCHED_ULE

[sam at FreeBSD.org]

Synopsis: [wpi] wpi doesnt work if kernel has options SCHED_ULE

Responsible-Changed-From-To: freebsd-net->thompsa
Responsible-Changed-By: sam
Responsible-Changed-When: Tue Mar 18 21:54:31 UTC 2008
Responsible-Changed-Why: 
Hand to Andrew as he's been working on this driver.

FWIW my guess is this is preemption causing problems with the questionable
locking that used to be done by the driver.  I think Andrew's recent
round of changes eliminated that stuff.

http://www.freebsd.org/cgi/query-pr.cgi?pr=121720