CONFIG_ALPHA_CABRIOLET is not available for thedefaultarchitecture x86.
Result is shown for architecture alpha
default or selected kernelversion does not have config value CONFIG_ALPHA_CABRIOLET.
Result is shown for kernelversion 6.9.9

Cabriolet

modulename: sys_cabriolet.ko

configname: CONFIG_ALPHA_CABRIOLET

Alpha system type
└─>Cabriolet
In linux kernel since version 2.6.12  
Cabriolet AlphaPC64, AlphaPCI64 systems. Derived from EB64+ but now
baby-AT with Flash boot ROM, no on-board SCSI or Ethernet. 3 ISA
slots, 4 PCI slots (one pair are on a shared slot), uses plug-in
Bcache SIMMs. Requires power supply with 3.3V output.

source code: