CONFIG_ARCH_H1940 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

IPAQ H1940

modulename: mach-h1940.ko

and/or

configname: CONFIG_ARCH_H1940

Linux Kernel Configuration
└─>Samsung S3C24XX SoCs (deprecated, see help)
└─>Samsung S3C24XX SoCs Support
└─>IPAQ H1940
In linux kernel since version 2.6.12  
Say Y here if you are using the HP IPAQ H1940