CONFIG_ARCH_PRPMC1100 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
PrPMC1100
configname: CONFIG_ARCH_PRPMC1100
Linux Kernel Configuration
└─>Intel IXP4xx Implementation Options
└─>PrPMC1100
In linux kernel since version 2.6.12
Say 'Y' here if you want your kernel to support the Motorola
PrPCM1100 Processor Mezanine Module. For more information on
this platform, see <file:Documentation/arm/ixp4xx.rst>.
PrPCM1100 Processor Mezanine Module. For more information on
this platform, see <file:Documentation/arm/ixp4xx.rst>.