CONFIG_ALPHA_LX164 is not available for thedefaultarchitecture x86.
Result is shown for architecture alpha

LX164

modulename: sys_cabriolet.ko

configname: CONFIG_ALPHA_LX164

Alpha system type
└─>LX164
In linux kernel since version 2.6.12  
A technical overview of this board is available at
<http://www.unix-ag.org/Linux-Alpha/Architectures/LX164.html>.

source code:
arch/alpha/kernel/