Enhancing /proc/pci

 - Adding missing fields for PCI device lookup
 - Adding the domain (for now set to zero) as part of the slot name

Change-Id: Iebaf3b21f6ab5024738cbc1dea66d5ad3ada175d
external/mit/expat: Import

Change-Id: Ieb49357166b392956df6554a06fcae83c8fd519d