CONFIG_BOARD_MRMT_WIRELESS_BT is not available for thedefaultarchitecture x86.
Result is shown for architecture avr32
default or selected kernelversion does not have config value CONFIG_BOARD_MRMT_WIRELESS_BT.
Result is shown for kernelversion 6.5.1
Use Bluetooth (HCI) Module
configname: CONFIG_BOARD_MRMT_WIRELESS_BT
Wireless Module on ttyS2
└─>Use Bluetooth (HCI) Module