Prevent firmware from being built

configname: CONFIG_PREVENT_FIRMWARE_BUILD

Linux Kernel Configuration
└─>Device Drivers
└─>Generic Driver Options
└─>Prevent firmware from being built
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
Say yes to avoid building firmware. Firmware is usually shipped
with the driver and only when updating the firmware should a
rebuild be made.
If unsure, say Y here.