How to enable config in Kernel on boot?

[Himanshu Shekhar <irm2015006@iiita.ac.in>]

I browsed for file /boot/config/$(uname -r) and found a line

CONFIG DELL_RBTN # config not set

I want the feature to be available, and have used in some other distribution.

The file also says, do not modify it.

How can I get it working?

I am currently using Debian Stretch Linux 4.3 on Dell Inspiron 15 3543 amd64

Regards

Himanshu Shekhar