Spectrum streaming control, spectrum attributes back in each frame.

TODO: This feels kinda complex, and there's some repeated Processor code that needs to be refactored into a base class.

firmware/baseband/proc_nfm_audio.hpp

@@ -66,6 +66,8 @@ private:
 
 	bool configured { false };
 	void configure(const NBFMConfigureMessage& message);
+
+	void streaming_config(const SpectrumStreamingConfigMessage& message);
 };
 
 #endif/*__PROC_NFM_AUDIO_H__*/