ArmVirtualizationPkg/PciHostBridgeDxe: accommodate general address spaces
    
    The RootBridgeIoCheckParameter() function currently relies on the range
    limit being of the form (2^n - 1). This assumption is not necessarily
    true; handle the general case.
    
    Contributed-under: TianoCore Contribution Agreement 1.0
    Signed-off-by: Laszlo Ersek <lersek@redhat.com>