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!

perl -pi -0777 -e 's/\s*?if\s*\(\s*!\s*find_pci_device.*?,\s*\&(\w+)\s*\)\s*\)\s*return\s*0;(.*BOOT_DRIVER\s*\(.*?,)(.*?\))/$2 find_pci_boot_device, $1,$3/sm' *.c

find_pci_device() directly.

perl -pi -0777 -e 's/(_probe\s*\(\s*struct\s+dev.*?)(\s*\)\s*{.*?$)\s*struct pci_device.*?=\s*pci_device \( dev \);$/${1}, struct pci_device *pci${2}/ms' *.c

sis900 excluded from update

Probe mechanisms now use standard EISA and MCA bus methods, with 3c509.c
defining a custom ISA bus to handle the 3c509 contention resolution logic.