CONFIG_SMDK2440_CPU2440 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
SMDK2440 with S3C2440 CPU module
configname: CONFIG_SMDK2440_CPU2440
Linux Kernel Configuration
└─>Samsung S3C24XX SoCs (deprecated, see help)
└─>Samsung S3C24XX SoCs Support
└─>SMDK2440 with S3C2440 CPU module