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

bPlan Efika 5k2. MPC5200B based computer

modulename: efika-setup.ko

and/or

efika.ko

configname: CONFIG_PPC_EFIKA

Linux/PowerPC Kernel Configuration
└─>Platform support
└─>bPlan Efika 5k2. MPC5200B based computer
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
source code:
arch/powerpc/platforms/52xx/