CONFIG_PPC_82xx is not available for thedefaultarchitecture x86.
Result is shown for architecture powerpc

Freescale 82xx

modulename: mpc82xx.ko

configname: CONFIG_PPC_82xx

Processor Type
└─>Freescale 82xx
In linux kernel since version 2.6.15 (release Date: 2006-01-02)  
source code:
arch/powerpc/platforms/82xx/mpc82xx.c

depends
 or CONFIG_6xx or CONFIG_PPC_BOOK3S_32