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