P5B-MX/WiFi-AP BIOS 0604

1. Fixed showing 'SDRAM' issue when reading memory type with PC ProbeII.
2. Fixed the issue that the system does not wake up from S3 when using 4G memory.

1. 修正華碩診斷家 II 顯示記憶體種類錯誤的問題.
2. 修正當系統使用 4G 記憶體時, 系統無法從 S3 喚醒的問題.