sd/mmc format & fusing sequence

1st, change sd card when u-boot running

1. mmc rescan 0

2. make sdmmc partition

    fdisk -c 0

3. make foramt to each partition

    fatformat mmc 0:1

    ext2format mmc 0:2

    ext2format mmc 0:3

    ext2format mmc 0:4

4. bootcmd setup (addtionally bootargs setup if it needed)

    setenv bootcmd movi read kernel 40008000\; movi read rootfs 41000000 100000\;bootm 40008000 41000000;sav

5. fusing

    fastboot

2nd, executing fastboot on host(Linux/Windows...)
    fastboot flash ramdisk ramdisk-uboot.img;fastboot flash system system.img;fastboot flash userdata userdata.img;fastboot reboot