ata: duplicate variable sparse warning

drivers/ata/ata_piix.c:1502:7: warning: symbol 'rc' shadows an earlier one

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
diff --git a/drivers/ata/ata_piix.c b/drivers/ata/ata_piix.c
index b1d08a8..e6b4606 100644
--- a/drivers/ata/ata_piix.c
+++ b/drivers/ata/ata_piix.c
@@ -1499,7 +1499,7 @@
 	 * off.
 	 */
 	if (pdev->vendor == PCI_VENDOR_ID_INTEL && pdev->device == 0x2652) {
-		int rc = piix_disable_ahci(pdev);
+		rc = piix_disable_ahci(pdev);
 		if (rc)
 			return rc;
 	}