We don't need the definition for in_cksum repeated here since we get it from machine/in_cksum.h.  This definition prevents us from using hand-tuned assembler versions of in_cksum.
We don't need the definition for in_cksum repeated here since we get
it from machine/in_cksum.h.  This definition prevents us from using
hand-tuned assembler versions of in_cksum.

# this fixes the modules build on arm for ipfilter.

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