I am attempting to integrate a custom GPIO driver into my LTIB build. I have added the necessary Kconfig and Makefile files to the custom directory that holds my source code. The proper menus appear in my configuration selection and the driver builds successfully. The problem I have is that when I perform a 'make modules' command to add the board specific drivers to my file system, this driver does not get included. How do I force the module Make file to include this driver?