CONFIG_UCDIMM is not available for the selected architecture x86.
Result is shown for architecture m68k

uDsimm module support

modulename: ucsimm.ko

configname: CONFIG_UCDIMM

Linux Kernel Configuration
└─>uDsimm module support
In linux kernel since version 2.6.12 )
Support for the Arcturus Networks uDsimm module.
selects
CONFIG_M68VZ328

depends
CONFIG_M68VZ328 or CONFIG_M68KCLASSIC |
NOT | CONFIG_MMU