CONFIG_SCHED_MC is not available for the selected architecture x86.
Result is shown for architecture s390

CONFIG_SCHED_MC (not configurable)

configname: CONFIG_SCHED_MC

Linux Kernel Configuration
└─>Processor type and features
└─>SCHED_MC
In linux kernel since version 2.6.17 (release Date: 2006-06-17)
is selected by
CONFIG_SCHED_MC_PRIO