small program for ... write program to nandflash

主要功能：讀取SD card的 file ，拆解燒到nandflash 中。
需要的component有：

• SD card
• FAT filesystem
• Nandflash (Write)
  
• UART
  

Steps

1. Show messasge from UART
2. Detect SD Card
   
3. Read SD Card data
4. Parse FAT structure
5. Read File Name, find the File
6. Read File
7. Nandflash read sector
8. Nandflash write sector

Ref : Robert's RoATP Code.