CONFIG_ARCH_H720X is not available for the default architecture x86.
Result is shown for architecture arm
default or selected kernelversion does not have config value CONFIG_ARCH_H720X.
Result is shown for kernelversion 5.6.17

Hynix HMS720x-based

configname: CONFIG_ARCH_H720X

ARM system type
└─> Hynix HMS720x-based

This enables support for systems based on the Hynix HMS720x