[tokenring lanstreamer] clean up MWI / PCI_CACHE_LINE_SIZE usage
* remove PCI_CACHE_LINE_SIZE workaround, PCI core already does this for us. (main change) * propagate pci_set_dma_mask return value * add 'ULL' suffix to pci_set_dma_mask arg * propagate pci_enable_device return value * call pci_set_mwi, check and propagate its return value * call pci_clear_mwi and pci_disable_device on close, and probe error * call iounmap when cleaning up
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