x86: left over fix for leak of early_ioremp in dmi_scan

Index: linux-2.6/drivers/firmware/dmi_scan.c
===================================================================
@@ -353,6 +353,7 @@ void __init dmi_scan_machine(void)
 				return;
 			}
 		}
+		dmi_iounmap(p, 0x10000);
 	}
  out:	printk(KERN_INFO "DMI not present or invalid.\n");
 }