Attempt to work around problems caused by spurious interrupts and uninitialised interrupts in the APIC.  This seems to fix the problems being seen on systems using the RCC chipsets, eg. Dell PowerEdge 24x0.
Attempt to work around problems caused by spurious interrupts and
uninitialised interrupts in the APIC.  This seems to fix the problems
being seen on systems using the RCC chipsets, eg. Dell PowerEdge 24x0.

The actual nature of the problem probably needs further investigation,
but this patch allows us to actually function on these systems.

Submitted by:	Drew Eckhardt <drew@Poohsticks.Org>

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