libata: Add special ata_pio_need_iordy() handling for Compact Flash.
According to the Compact Flash specification r4.1, PIO modes 5 and 6 do not use iordy. Signed-off-by: David Daney <ddaney@caviumnetworks.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
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78a7ba47
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