CONFIG_MCKINLEY is not available for thedefaultarchitecture x86.
Result is shown for architecture ia64
default or selected kernelversion does not have config value CONFIG_MCKINLEY.
Result is shown for kernelversion 6.9.9

Itanium 2

configname: CONFIG_MCKINLEY

Processor type
└─>Itanium 2
In linux kernel since version 2.6.12  
Select this to configure for an Itanium 2 (McKinley) processor.