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

Motorola-LoPEC

modulename: pci_auto.ko

and/or

lopec.ko

configname: CONFIG_LOPEC

Machine Type
└─>Motorola-LoPEC
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
source code:
arch/ppc/syslib/

is selected by
CONFIG_MPC10X_BRIDGE