[CONFIGS][C61] Add C61 board defconfigs
Add defconfig files allowing to build Edgehog Embedded and Things for C61 (SBC-3.5-MX8M-Mini) board based on i.MX8M-Mini processor.
Add defconfig files allowing to build Edgehog Embedded and Things for C61 (SBC-3.5-MX8M-Mini) board based on i.MX8M-Mini processor.