CONFIG_MACH_NEXCODER_2440 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

NexVision NEXCODER 2440 Light Board

modulename: mach-nexcoder.ko

and/or

configname: CONFIG_MACH_NEXCODER_2440

Linux Kernel Configuration
└─>Samsung S3C24XX SoCs Support
└─>NexVision NEXCODER 2440 Light Board
In linux kernel since version 2.6.12  
Say Y here if you are using the Nex Vision NEXCODER 2440 Light Board