doc other kernel module example

readme.md

@@ -761,7 +761,9 @@ Check out more information on these links:
 
 ## TO DO
 
- - add [kernel module example](https://stackoverflow.com/questions/36188472/yocto-adding-kernel-module-recipe-to-image-but-it-doesnt-load-on-boot);
+ - add *kernel module*: 
+   - [example1](https://stackoverflow.com/questions/36188472/yocto-adding-kernel-module-recipe-to-image-but-it-doesnt-load-on-boot); and 
+   - [example2](https://developer.toradex.com/knowledge-base/custom-meta-layers-recipes-images-in-yocto-project#Compile_a_Custom_Kernel_Module);
  - make a [cmake module](https://gitlab.kitware.com/cmake/community/-/wikis/doc/tutorials/How-To-Find-Libraries) for `libhello`;
  - how to deploy `libhello-dev` into the image ? this would  include the library headers.