pci/of: expand match PCI devices to OF nodes

Expand match criteria so that multiple OF nodes with
the same BDF will match with the correct PCI device.
OF node will have an optional compatible entry with
device and vendor ID, which will be matched to a PCI
device and vendor ID.

Change-Id: I6e654d5dbf55a05b4e1b6a60d5d87addc2cb14b9
Signed-off-by: Tony Truong <truong@codeaurora.org>
Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>