CONFIG_LH7A40X_CONTIGMEM is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

Disable NUMA/SparseMEM Support

configname: CONFIG_LH7A40X_CONTIGMEM

Linux Kernel Configuration
└─>LH7A40X Implementations
└─>Disable NUMA/SparseMEM Support
In linux kernel since version 2.6.12  
Say Y here if your bootloader sets the SROMLL bit(s) in
the SDRAM controller, organizing memory as a contiguous
array. This option will disable sparse memory support
and force the kernel to manage all memory in one node.

Setting this option incorrectly may prevent the kernel
from booting. It is OK to leave it N.

For more information, consult
Documentation/arm/Sharp-LH/SDRAM.