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

EV5 CPU daughtercard (model 5/xxx)?

configname: CONFIG_ALPHA_PRIMO

Linux Kernel Configuration
└─>System setup
└─>EV5 CPU daughtercard (model 5/xxx)?
In linux kernel since version 2.6.12  
Say Y if you have an AS 1000 5/xxx or an AS 1000A 5/xxx.