CONFIG_CPM2 is not available for thedefaultarchitecture x86.
Result is shown for architecture ppc

CONFIG_CPM2 (not configurable)

modulename: mac-fcc.ko

and/or

rheap.ko

and/or

cpm2_common.ko

configname: CONFIG_CPM2

Linux/PowerPC Kernel Configuration
└─>Platform options
└─>CPM2
In linux kernel since version 2.6.19 (release Date: 2006-11-29)  
The CPM2 (Communications Processor Module) is a coprocessor on
embedded CPUs made by Motorola. Selecting this option means that
you wish to build a kernel for a machine with a CPM2 coprocessor
on it (826x, 827x, 8560).

source code:
drivers/net//fs_enet/