CONFIG_MACH_BORZOI is not available for the selected architecture x86.
Result is shown for architecture arm

Enable Sharp Zaurus SL-3100 (Borzoi) Support

configname: CONFIG_MACH_BORZOI

Linux Kernel Configuration
└─>Enable Sharp Zaurus SL-3100 (Borzoi) Support
In linux kernel since version 2.6.20 (release Date: 2007-02-04)