mmc 移植

linux自带的无法对出错的mmc进行处理，需要自己移植mmc工具，参考mmc-utils

编译脚本：

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#!/bin/bash

CC=/home/tuling/.FuHan-arm-linux/opt/arm-fullhanv3-linux-uclibcgnueabi-b6/bin/arm-fullhanv3-linux-uclibcgnueabi-gcc
CROSS_COMPILE=/home/tuling/.FuHan-arm-linux/opt/arm-fullhanv3-linux-uclibcgnueabi-b6/bin/arm-fullhanv3-linux-uclibcgnueabi
ARCH=arm
export CC=/home/tuling/.FuHan-arm-linux/opt/arm-fullhanv3-linux-uclibcgnueabi-b6/bin/arm-fullhanv3-linux-uclibcgnueabi-gcc
export CROSS_COMPILE=/home/tuling/.FuHan-arm-linux/opt/arm-fullhanv3-linux-uclibcgnueabi-b6/bin/arm-fullhanv3-linux-uclibcgnueabi
export ARCH=arm
build()
{
        cd mmc-utils
        make clean
        make CROSS_COMPILE=/home/tuling/.FuHan-arm-linux/opt/arm-fullhanv3-linux-uclibcgnueabi-b6/bin/arm-fullhanv3-linux-uclibcgnueabi
        cd ..
}
if [ -d "mmc-utils" ];then
        build
else
        git clone https://git.kernel.org/pub/scm/utils/mmc/mmc-utils.git
        cd setup-tools/mmc
fi