CONFIG_PCI is not available for thedefaultarchitecture x86.
Result is shown for architecture m68knommu

PCI support

modulename: pci.ko

and/or

pci_v3.ko

and/or

pci-quirks.ko

and/or

pcic.ko

and/or

ebus.ko

and/or

bios32.ko

and/or

m1535plus.ko

and/or

pci-dma.ko

and/or

pci_auto.ko

and/or

mpc52xx_pci.ko

and/or

apus_pci.ko

and/or

early-quirks.ko

configname: CONFIG_PCI

uClinux/68k (w/o MMU) Kernel Configuration
└─>Bus options (PCI, PCMCIA, EISA, MCA, ISA)
└─>PCI support
In linux kernel since version 2.6.12  
Support for PCI bus.