CONFIG_SCB2_MI0_SLOT8 is not available for thedefaultarchitecture x86.
Result is shown for architecture blackfin
default or selected kernelversion does not have config value CONFIG_SCB2_MI0_SLOT8.
Result is shown for kernelversion 6.7-rc3

Slot 8 slave interface id

configname: CONFIG_SCB2_MI0_SLOT8

Linux Kernel Configuration
└─>BF609 Specific Configuration
└─>SCB2 Master Interface 0
└─>Slot 8 slave interface id
In linux kernel since version 3.12 (release Date: 2013-11-03)