CONFIG_UNICORE32 is not available for thedefaultarchitecture x86.
Result is shown for architecture unicore32

CONFIG_UNICORE32 (not configurable)

modulename: unicore2-cpufreq.ko

configname: CONFIG_UNICORE32

Linux Kernel Configuration
└─>UNICORE32
In linux kernel since version 2.6.39 (release Date: 2011-05-18)  
UniCore-32 is 32-bit Instruction Set Architecture,
including a series of low-power-consumption RISC chip
designs licensed by PKUnity Ltd.
Please see web page at <http://www.pkunity.com/>.

source code:
drivers/cpufreq/unicore2-cpufreq.c