libata: factor out ata_pci_activate_sff_host() from ata_pci_one()
Factor out ata_pci_activate_sff_host() from ata_pci_one(). This does about the same thing as ata_host_activate() but needs to be separate because SFF controllers use different and multiple IRQs in legacy mode. This will be used to make SFF LLD initialization more flexible. Signed-off-by: NTejun Heo <htejun@gmail.com> Signed-off-by: NJeff Garzik <jeff@garzik.org>
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