Support S3C24x0/yaffs/USB/CS8900/DM9000/OpenJTAG/Nor, Nand start u

代码说明：

支持S3C24x0/yaffs/USB/CS8900/DM9000/OpenJTAG/Nor,Nand启动的u-boot 添加的功能： 1. 同时支持S3C2410和S3C2440 2. 支持串口xmodem协议 3. 支持USB下载，可以在PC上使用dnw传数据 4. 支持网卡芯片CS8900 5. 支持NAND Flash读写 6. 支持从Nor/Nand Flash启动 7. 支持烧写yaffs文件系统映象-Support S3C24x0/yaffs/USB/CS8900/DM9000/OpenJTAG/Nor, Nand start u-boot to add the functionality: 1. At the same time, support for S3C2410 and S3C24402. Support XMODEM Serial Protocol 3. To support the USB to download, you can use the PC on dnw Chuan-data 4. to support the network adapter chip CS89005. support for NAND Flash read and write 6. support from the Nor/Nand Flash boot 7. yaffs file system support programmer mapping