The patch removes the pci_confN_(read|write)_config_(byte|word|dword) mess and
pares it down to pci_confN_(read|write).  This change is reflected in the
pci_ops structure, which only has read and write function pointers rather than
the byte, word, and dword versions.  These changes happen in the pci_conf(1|2)
and pci_bios read and write calls.

This patch also removes the pci_config_(read|write) function pointers.  People
shouldn't be using these (I don't think) and should be using the pci_ops
structure linked through the pci_dev structure.  These end up calling the same
functions that the pci_config_(read|write) pointers refer to anyway.