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

NetWinder

modulename: netwinder-hw.ko

configname: CONFIG_ARCH_NETWINDER

Linux Kernel Configuration
└─>Footbridge Implementations
└─>NetWinder
In linux kernel since version 2.6.12  
Say Y here if you intend to run this kernel on the Rebel.COM
NetWinder. Information about this machine can be found at:

<http://www.netwinder.org/>

Saying N will reduce the size of the Footbridge kernel.

source code: