Rev. 1.204 and 1.205 got an erronous version of destroy_dev() that calls destroy_dev_sched() with cdev mutex locked. Commit the code that was actually tested.
Rev. 1.204 and 1.205 got an erronous version of destroy_dev() that
calls destroy_dev_sched() with cdev mutex locked. Commit the code
that was actually tested.

Pointy hat to:	kib
Approved by:	re (implicit)

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase