CONFIG_YOSEMITE is not available for thedefaultarchitecture x86.
Result is shown for architecture powerpc

Yosemite

configname: CONFIG_YOSEMITE

Linux Kernel Configuration
└─>Yosemite
In linux kernel since version 2.6.26 (release Date: 2008-07-13)  
This option enables support for the AMCC PPC440EP evaluation board.