Revert if_bfereg.h rev 1.8; restore the RX and TX list sizes to 511.
Revert if_bfereg.h rev 1.8; restore the RX and TX list sizes to 511.

Two users have reported problems due to the smaller list sizes.

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