Wishbone LPC Host and Peripheral Bridge

The wb_lpc_host module doesn't handle the case where no device on the bus responds with a valid sync cycle for 3 clocks (see 4.2.1.9 paragraph 1 in the LPC spec) (ie in LPC_ST_SYNC state and lad_i == 4'b1111. It looks like the correct action is to force an abort as per 4.2.1.13.