[PATCH] PCI: clean up pci.h and split pci register info to separate header file.

This cleans up some of the #ifdef CONFIG_PCI stuff up, and moves the pci register
info out to a separate file, where it belongs.  Eventually we can stop including
this file from within pci.h, but lots of code needs to be audited first.
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>