Fix style(9) nits, reduce unnecessary type castings, etc., for bpf_setf().
Fix style(9) nits, reduce unnecessary type castings, etc., for bpf_setf().

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