 - Fix the invalid priority panics people are seeing by forcing    tdq_runq_add to select the runq rather than hoping we set it properly    when we adjusted the priority.  This involves the same number of    branches as before so should perform identically without the extra    fragility.
 - Fix the invalid priority panics people are seeing by forcing
   tdq_runq_add to select the runq rather than hoping we set it properly
   when we adjusted the priority.  This involves the same number of
   branches as before so should perform identically without the extra
   fragility.

Tested by:	bz
Reviewed by:	bz

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