libata pata_amd: ACPI checks for 80wire cable

We can make use of this on the pata_amd driver as many Nvidia devices
don't have reliable cable detect.
Signed-off-by: NAlan Cox <alan@redhat.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

drivers/ata/pata_amd.c

@@ -270,6 +270,9 @@ static int nv_cable_detect(struct ata_port *ap)
  	pci_read_config_word(pdev, 0x62 - 2 * ap->port_no, &udma);
  	if ((udma & 0xC4) == 0xC4 || (udma & 0xC400) == 0xC400)
 		cbl = ATA_CBL_PATA80;
+	/* And a triple check across suspend/resume with ACPI around */
+	if (ata_acpi_cbl_80wire(ap))
+		cbl = ATA_CBL_PATA80;
 	return cbl;
 }