♻️ Small sound / buzz refactor (#24520)

Marlin/src/gcode/gcode.cpp

@@ -765,7 +765,7 @@ void GcodeSuite::process_parsed_command(const bool no_ok/*=false*/) {
         case 290: M290(); break;                                  // M290: Babystepping
       #endif
 
-      #if HAS_BUZZER
+      #if HAS_SOUND
         case 300: M300(); break;                                  // M300: Play beep tone
       #endif
 

Marlin/src/gcode/gcode.h

@@ -914,7 +914,7 @@ private:
     static void M290();
   #endif
 
-  #if HAS_BUZZER
+  #if HAS_SOUND
     static void M300();
   #endif
 

Marlin/src/gcode/lcd/M300.cpp

@@ -22,7 +22,7 @@
 
 #include "../../inc/MarlinConfig.h"
 
-#if HAS_BUZZER
+#if HAS_SOUND
 
 #include "../gcode.h"
 
@@ -42,4 +42,4 @@ void GcodeSuite::M300() {
   BUZZ(duration, frequency);
 }
 
-#endif // HAS_BUZZER
+#endif // HAS_SOUND