CONFIG_ARCH_LH7A40X 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_LH7A40X.
Result is shown for kernelversion

Sharp LH7A40X

configname: CONFIG_ARCH_LH7A40X

ARM system type
└─> Sharp LH7A40X

Say Y here for systems based on one of the Sharp LH7A40X
System on a Chip processors. These CPUs include an ARM922T
core with a wide array of integrated devices for
hand-held and low-power applications.