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

CONFIG_PPC_DCR (not configurable)

modulename: dcr.ko

configname: CONFIG_PPC_DCR

Linux Kernel Configuration
└─>PPC_DCR
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
source code:
arch/powerpc/sysdev/dcr.c

is selected by
CONFIG_IBM_EMAC