GEC2410开发板初始化程序，此段程序初始化sdram和nandflash的基本配置（nandflash的配置不一定对）, 然后就可以将bootloader直接下载到SDRAM中运行。-GEC2410 development board initialization code, the program initialization paragraph nandflash sdram and basic configuration of (nandflash configuration not necessarily), then it can be directly downloaded to SDRAM bootloader run.