Enable Video Mode Handling Helpers

configname: CONFIG_FB_MODE_HELPERS

Linux Kernel Configuration
└─>Device Drivers
└─>Graphics support
└─>Frame buffer Devices
└─>Support for frame buffer device drivers
└─>Enable Video Mode Handling Helpers
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
This enables functions for handling video modes using the
Generalized Timing Formula and the EDID parser. A few drivers rely
on this feature such as the radeonfb, rivafb, and the i810fb. If
your driver does not take advantage of this feature, choosing Y will
just increase the kernel size by about 5K.