- enable SPI/SPI Flash/SDIO/SDCARD default
- update mount file system code
- enable C99 for MDK4 template
- update all project file

- timespec has already been declared
- <sys/socket.h> not found

bsp/stm32f429-apollo/rtconfig.h

1. Change the type of cmd to 'int';
2. Remove RT_LWIP_USING_RT_MEM macro;