[libata] Improve timeout handling

On a timeout call a device specific handler early in the recovery so that
we can complete and process successful commands which timed out due to IRQ
loss or the like rather more elegantly.

[Revised to exclude the timeout handling on a few devices that inherit from
 SFF but are not SFF enough to use the default timeout handler]

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

drivers/ata/pdc_adma.c

@@ -148,6 +148,8 @@ static struct scsi_host_template adma_ata_sht = {
 static struct ata_port_operations adma_ata_ops = {
 	.inherits		= &ata_sff_port_ops,
 
+	.lost_interrupt		= ATA_OP_NULL,
+
 	.check_atapi_dma	= adma_check_atapi_dma,
 	.qc_prep		= adma_qc_prep,
 	.qc_issue		= adma_qc_issue,