CONFIG_ARCH_SA1100 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

SA1100-based

modulename: gpio-sa1100.ko

and/or

irq-sa11x0.ko

configname: CONFIG_ARCH_SA1100

ARM system type
└─>SA1100-based
In linux kernel since version 2.6.12  
Support for StrongARM 11x0 based boards.


depends
 or CONFIG_ARCH_MULTI_V4 |
| CONFIG_ATAGS or CONFIG_CPU_LITTLE_ENDIAN or CONFIG_MMU or  NOT CONFIG_ARCH_GEMINI or  NOT CONFIG_ARCH_MOXART or  NOT CONFIG_ARCH_MULTI_V4T or  NOT CONFIG_ARCH_MULTI_V5