sprd 开机模式配置

sprd_kp.c//u-boot64

unsigned int check_key_boot(unsigned char key){    if(KEY_VOLUMEUP == key)        return CMD_FACTORYTEST_MODE;    else if(KEY_HOME == key)        return CMD_FASTBOOT_MODE;    else if(KEY_VOLUMEDOWN== key)        return CMD_RECOVERY_MODE;    else       return 0;}