2. Add choice menu for lcd configure
3. Remove origin sdcard driver and add new mmc driver that use kernel
mmc stack for s3c2440

2. Modify the return code to -1 when failed
3. Change the mounting filesystem from ramfs to sdcard
4. Replace RT_USING_RTGUI with PKG_USING_GUIENGINE and remove RT_USING_FTK

1、加入Kconfig以支持图形化菜单配置
2、编译脚本中添加动态模块编译参数
3、开启自动初始化机制支持
4、重构串口驱动以解决开启posix支持后终端无响应问题
5、解决dm9000网卡驱动link up问题
6、添加mnt.c文件用来挂载文件系统

Signed-off-by: Nduhuanpeng <548708880@qq.com>

rt_hw_fpu_init() is defined in mips_fpu.h,
in board.c refered it without including mips_fpu.h.
Signed-off-by: Nduhuanpeng <548708880@qq.com>

-mips32 will break the compilation if FPU enabled.
Signed-off-by: Nduhuanpeng <548708880@qq.com>

1、【修改】返回值。

调整stm32_flash_erase的返回值

1、【修改】运算方式，更加简洁易懂；
2、【修正】代码格式 tab、 LOG_D；
3、【增加】返回值；
4、【去除】bank1_flag和bank2_flag，改用bank_size判定。

1. modify at32_msp default configuration 2. add hwtimer driver and fix up some driver errors 3. update related files

MM32L073PF ->  MM32L373PF

Added if null before used.

rt_malloc -> rt_calloc