Recovered lost ctcss/roger beep/correct mic gain in mic app from 1.5.1 without ALC (Auto mic Limit Control-AK) (#633)

* Update spectrum_collector.cpp

lower case correction

* Update spectrum_collector.cpp

Description changed , better explanation.

* Revert "Update spectrum_collector.cpp"

This reverts commit 4a6fc35384.

* Revert "Update spectrum_collector.cpp"

This reverts commit 35cece1cb0.

* Revert "Solving Compile error on gcc10 . Keeping same safety protection about the size of the array ,but with slightly different sintax."

This reverts commit f4db4e2b53.

* Recovered CTCSS-Roger_beep-MIC-GAIN from 1.5.1

* Temporary removing ALC-( for AK4951 platorm)

firmware/common/wm8731.hpp

@@ -345,9 +345,8 @@ public:
  	void speaker_disable() {};
 
 
-	void microphone_enable(int8_t alc_mode) override {
-		(void)alc_mode; 		// to avoid "unused warning" when compiling. (@WM8731 we do not use that parameter) 
-		// TODO: Implement,
+	void microphone_enable() override {
+		// TODO: Implement
 	}
 
 	void microphone_disable() override {