[libata] ata_piix: properly terminate DMI system list

If you don't terminate a list, bad things happen...

Signed-off-by: Jeff Garzik <[e-mail]>

drivers/ata/ata_piix.c

···
 				DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M500"),
 			},
 		},
-		{ }
+
+		{ }	/* terminate list */
 	};
 	static const char *oemstrs[] = {
 		"Tecra M3,",
···
 				DMI_MATCH(DMI_PRODUCT_NAME, "M570U"),
 			},
 		},
+
+		{ }	/* terminate list */
 	};
 	u32 iocfg;