CONFIG_FB_XVR500 is not available for thedefaultarchitecture x86.
Result is shown for architecture 64BIT

Sun XVR-500 3DLABS Wildcat support

modulename: sunxvr500.ko

configname: CONFIG_FB_XVR500

Linux Kernel Configuration
└─>Device Drivers
└─>Graphics support
└─>Frame buffer Devices
└─>Support for frame buffer devices
└─>PCI support
└─>Sun XVR-500 3DLABS Wildcat support
In linux kernel since version 2.6.24 (release Date: 2008-01-24)  
This is the framebuffer device for the Sun XVR-500 and similar
graphics cards based upon the 3DLABS Wildcat chipset. The driver
only works on sparc64 systems where the system firmware has
mostly initialized the card already. It is treated as a
completely dumb framebuffer device.

source code: