CONFIG_SUPERH32 is not available for thedefaultarchitecture x86.
Result is shown for architecture sh

CONFIG_SUPERH32 (not configurable)

modulename: sys_sh32.ko

and/or

imask.ko

configname: CONFIG_SUPERH32

Linux Kernel Configuration
└─>SUPERH32
In linux kernel since version 2.6.25 (release Date: 2008-04-16)  
source code:
arch/sh/kernel/sys_sh32.c