1. Add default clause to FSMs in Bit
       Controller and Byte Controller
    2. Eliminate (for now) slave_reset from the
       second master FSM reset clause

    1. Eliminate unused reg slave_adr_received_d
       in the bit controller since it depresses
       the coverage score
    2. Whitespace changes in states ST_SL_WAIT,
       ST_SL_WR, and ST_SL_RD
    3. Add reset to ST_IDLE upon slave_reset in
       state ST_SL_WR