CONFIG_PPC_83xx is not available for thedefaultarchitecture x86.
Result is shown for architecture ppc

CONFIG_PPC_83xx (not configurable)

modulename: ipic.ko

configname: CONFIG_PPC_83xx

Linux/PowerPC Kernel Configuration
└─>Platform options
└─>PPC_83xx
In linux kernel since version 2.6.15 (release Date: 2006-01-02)  
source code:
arch/powerpc/sysdev/ipic.c