1.清空minnowmax kernel以后，从头编译的.config保存一份

2.make -c menuconfig linux-yocto保存新的.config

3.diff old_config new_config 得到配置段，添加到kernel配置中

4.在PC上跑docker时，载入了3个模块，一个是bridge，还有两个，找到这2个对应的kernel config

5.In general, however, the Yocto Project maintainers take care of moving the SRC_URI-specified

　configuration options to the kernel‘s meta branch

enabel docker on minnowmax board