[ros-svn] [hpoussin] 18449: Transform pci.sys to a Plug-and-Play driver.

[hpoussin at svn.reactos.com]

Transform pci.sys to a Plug-and-Play driver.
Simplify most of the PciCreateCompatible*String functions
Fix error handling in FdoQueryBusRelations
=> pci.sys now manages only 1 bus. It is still using HalGetBusDataByOffset/HalGetBusData which are deprecated, but it shouldn't be too hard to remove


Updated files:
trunk/reactos/bootdata/hivesys.inf
trunk/reactos/drivers/bus/pci/fdo.c
trunk/reactos/drivers/bus/pci/pci.c
trunk/reactos/drivers/bus/pci/pci.h
trunk/reactos/drivers/bus/pci/pdo.c