ArmVirtualizationPkg/ArmVirtualizationQemu: enable PCI support
    
    Beyond including the foundational drivers in the DSC and FDF files, we
    enable virtio-over-PCI, and turn on QemuBootOrderLib's OFW-to-UEFI device
    path translation for PCI devices.
    
    Contributed-under: TianoCore Contribution Agreement 1.0
    Signed-off-by: Laszlo Ersek <lersek@redhat.com>