CONFIG_ARCH_L7200 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
default or selected kernelversion does not have config value CONFIG_ARCH_L7200.
Result is shown for kernelversion 5.4.229

LinkUp-L7200

configname: CONFIG_ARCH_L7200

ARM system type
└─>LinkUp-L7200
In linux kernel since version 2.6.12  
Say Y here if you intend to run this kernel on a LinkUp Systems
L7200 Software Development Board which uses an ARM720T processor.
Information on this board can be obtained at:

<http://www.linkupsys.com/>

If you have any questions or comments about the Linux kernel port
to this board, send e-mail to <sjhill@cotw.com>.