Move the DTrace return IDT vector back up from 0x20 to 0x92.  The 0x20 vector is currently dedicated to servicing IRQ 0 from the 8259A's, so it shouldn't be overloaded for DTrace.
Move the DTrace return IDT vector back up from 0x20 to 0x92.  The 0x20
vector is currently dedicated to servicing IRQ 0 from the 8259A's, so
it shouldn't be overloaded for DTrace.

Tested by:	rstone
MFC after:	1 week

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