Defined in 3 files as a config:
- boards/arm/holyiot_yj16019/Kconfig.defconfig, line 12 (as a config)
- samples/application_development/out_of_tree_board/boards/arm/nrf52840_pca10056/Kconfig, line 9 (as a config)
- soc/arm/nordic_nrf/nrf52/Kconfig.soc, line 277 (as a config)