CONFIG_ARCH_IOP13XX is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
default or selected kernelversion does not have config value CONFIG_ARCH_IOP13XX.
Result is shown for kernelversion 6.9.5

IOP13xx-based

modulename: setup.ko

and/or

irq.ko

and/or

pci.ko

and/or

io.ko

and/or

tpmi.ko

and/or

cp6.ko

and/or

time.ko

configname: CONFIG_ARCH_IOP13XX

ARM system type
└─>IOP13xx-based
In linux kernel since version 2.6.21 (release Date: 2007-04-25)  
Support for Intel's IOP13XX (XScale) family of processors.

source code: