MFC r273283:
MFC r273283:

  Attach this driver during BUS_PASS_BUS and move the cpu init code to a
  bus_new_pass() handler so it doesn't happen until BUS_PASS_CPU.  This allows
  the anatop driver to outbid the generic simplebus driver (which the FDT
  data describes as compatible).

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