trick with "touch -B 2" doesn't work because the file that we're
carefully timestamping just gets deleted anyway.

list for any build, e.g.
  make bin/pnic.dsk DEBUG=pci,pnic
This will drag in debugging-enabled versions of pci.c and pnic.c.

since we probably shouldn't be doing this to arbitrary devices during a
PCI bus scan...

all return unsigned quantities.

quickly.

Prevented find_pci_device() from being an endless loop.

specification of ISA_PROBE_ADDRS.

otherwise isapnp_max_csn is zero and we never call fill_isapnp_device.

Fix debug message.

udelay().

(just build debugging versions of the relevant bus objects).

relocation and (hence) presumably has not been used since Etherboot 5.0.
Say bye-bye!