CONFIG_PCI is not available for thedefaultarchitecture x86.
Result is shown for architecture sh

PCI support

modulename: pci_v3.ko

and/or

pci.ko

and/or

fpga.ko

and/or

pcidma.ko

and/or

pcic.ko

and/or

ebus.ko

and/or

bios32.ko

and/or

m1535plus.ko

and/or

e2a.ko

and/or

pci-dma.ko

and/or

indirect_pci.ko

and/or

qspan_pci.ko

and/or

mpc52xx_pci.ko

and/or

apus_pci.ko

configname: CONFIG_PCI

Linux Kernel Configuration
└─>PCI support
In linux kernel since version 2.6.12  
Find out whether you have a PCI motherboard. PCI is the name of a
bus system, i.e. the way the CPU talks to the other stuff inside
your box. If you have PCI, say Y, otherwise N.

The PCI-HOWTO, available from
<http://www.tldp.org/docs.html#howto>, contains valuable
information about which PCI hardware does work under Linux and which
doesn't.

source code:
/arch/arm/mach-integrator/