Back before the dawn of time pci_dma_* with a NULL pci_dev argument was used for all kinds of things, e.g. dma mapping for non-PCI devices. All this has been long removed, but it turns out we still care for a NULL pci_dev in the wrappers, and we still have two odd USB drivers that use pci_dma_alloc_consistent for allocating memory while ignoring the dma_addr_t entirely. This series switches the two drivers to use plain kzalloc and then removes the handling of the NULL pci_dev in the pci_dma_* wrappers.
