CONFIG_PPC_OF_PLATFORM_PCI is not available for thedefaultarchitecture x86.
Result is shown for architecture powerpc
default or selected kernelversion does not have config value CONFIG_PPC_OF_PLATFORM_PCI.
Result is shown for kernelversion 6.9.9

CONFIG_PPC_OF_PLATFORM_PCI (not configurable)

configname: CONFIG_PPC_OF_PLATFORM_PCI

Linux Kernel Configuration
└─>PPC_OF_PLATFORM_PCI
In linux kernel since version 2.6.20 (release Date: 2007-02-04)