CONFIG_MWINCHIP2 is not available for thedefaultarchitecture x86.
Result is shown for architecture i386
default or selected kernelversion does not have config value CONFIG_MWINCHIP2.
Result is shown for kernelversion 5.4.123

Winchip-2

configname: CONFIG_MWINCHIP2

Processor family
└─>Winchip-2
In linux kernel since version 2.6.12  
Select this for an IDT Winchip-2. Linux and GCC
treat this chip as a 586TSC with some extended instructions
and alignment requirements.