sata_sis: missing PM support

sata_sis has no suspend/resume methods. The default ones will do fine and
are needed on some systems.
Signed-off-by: NAlan Cox <alan@linux.intel.com>
Signed-off-by: NTejun Heo <tj@kernel.org>

drivers/ata/sata_sis.c

@@ -83,6 +83,10 @@ static struct pci_driver sis_pci_driver = {
 	.id_table		= sis_pci_tbl,
 	.probe			= sis_init_one,
 	.remove			= ata_pci_remove_one,
+#ifdef CONFIG_PM
+	.suspend		= ata_pci_device_suspend,
+	.resume			= ata_pci_device_resume,
+#endif
 };
 
 static struct scsi_host_template sis_sht = {