Remove subr_diskslice.c and subr_diskmbr.c which I can find no trace of why should be needed in the powerpc files.  Not compile tested.
Remove subr_diskslice.c and subr_diskmbr.c which I can find no trace of
why should be needed in the powerpc files.  Not compile tested.

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