Reenable ithread preemption for interrupts that occur while executing in the kernel.  I accidentally broke this with the new interrupt code that came in prior to 5.2.
Reenable ithread preemption for interrupts that occur while executing in
the kernel.  I accidentally broke this with the new interrupt code that
came in prior to 5.2.

Submitted by:	bde

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