CONFIG_CPM1 is not available for thedefaultarchitecture x86.
Result is shown for architecture ppc

CONFIG_CPM1 (not configurable)

configname: CONFIG_CPM1

Linux/PowerPC Kernel Configuration
└─>Platform options
└─>CPM1
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
The CPM1 (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 CPM1 coprocessor
on it (8xx, 827x, 8560).

depends
CONFIG_8xx

is selected by
CONFIG_FS_ENET_HAS_FEC