tcam: fuse masking and memcmp/murmur
tcam: fuse masking and memcmp/murmur

Uses the new incremental hash functions. The main win is in skipping words
where the mask is zero.

Reduces time per lookup by 20% in the benchmark.

floodlight/ivs,vezril/ivs,vezril/ivs,floodlight/ivs,floodlight/ivs,vezril/ivs