Add wideband spectrum processor.

firmware/baseband/main.cpp

@@ -56,6 +56,7 @@
 #include "proc_nfm_audio.hpp"
 #include "proc_wfm_audio.hpp"
 #include "proc_fsk.hpp"
+#include "proc_wideband_spectrum.hpp"
 
 #include "clock_recovery.hpp"
 #include "access_code_correlator.hpp"
@@ -296,6 +297,10 @@ int main(void) {
 					baseband_processor = new FSKProcessor(message_handlers);
 					break;
 
+				case 4:
+					baseband_processor = new WidebandSpectrum();
+					break;
+
 				default:
 					break;
 				}