Workaround build for PAE case for now - revert the PHYS case to previous panic behavior.
Workaround build for PAE case for now - revert the PHYS
case to previous panic behavior.

I have a real fix that changes the sg dma tag allocation
to be limited to the under 4GB address space but would
prefer to have review before committing.

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