The following patch remove irq_resource and dma_resource from pci_dev.  It
appears that the serial pci driver depends on irq_resource, however, it may be
broken portions of an old quirk.  I attempted to maintain the existing behavior
while removing irq_resource.  I changed FL_IRQRESOURCE to FL_NOIRQ.  Russell,
could you provide any comments?  irq_resource and dma_resource are most likely
remnants from when pci_dev was shared with pnp.