CONFIG_SNAPGEAR is not available for thedefaultarchitecture x86.
Result is shown for architecture m68k
default or selected kernelversion does not have config value CONFIG_SNAPGEAR.
Result is shown for kernelversion 6.2.5

SnapGear router board support

configname: CONFIG_SNAPGEAR

Linux Kernel Configuration
└─>SnapGear router board support
In linux kernel since version 2.6.12  
Special additional support for SnapGear router boards.

depends
CONFIG_NETtel