[libata] pata_hpt3x3: correct _freeze() function declaration

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

drivers/ata/pata_hpt3x3.c

@@ -96,7 +96,7 @@ static void hpt3x3_set_dmamode(struct ata_port *ap, struct ata_device *adev)
  *	writing to the control register or the chip will hang
  */
 
-static int hpt3x3_freeze(struct ata_port *ap)
+static void hpt3x3_freeze(struct ata_port *ap)
 {
 	void __iomem *mmio = ap->ioaddr.bmdma_addr;