* add rt1170 bsp
* add rt1020 bsp

Signed-off-by: NTing Liu <ting.liu@nxp.com>

* [gcc][armcc][armclang] rtconfig.CROSS_TOOL->rtconfig.PLATFORM

* 添加 imxrt1060-evk BSP

* add LVGL

* add README.md

* Delete irrelevant files

* Modify the optimization level to O1

* Organize documents

* Source code formatting

* adding fsl_os_abstraction porting

* port usbh to imxrt
Co-authored-by: Nguo <guozhanxin@rt-thread.com>

* [console] 解决在没有定义RT_USING_DEVICE的情况下使用device报错的问题

* format codes

* [libc] 整理格式

* refresh projects

CCFLAGS is used by gcc and g++ compiler. So CFLAGS should be used for
gcc to avoid passing gcc flags to g++.

修复了构建脚本未编译库文件fsl_elcd.c的问题