audio: Make system-specific audio format types part of SDL_AudioFormat.

This keeps them all in the same place, and merges them into the documentation.

include/SDL3/SDL_audio.h

@@ -141,19 +141,20 @@ typedef enum SDL_AudioFormat
         /* SDL_DEFINE_AUDIO_FORMAT(1, 1, 0, 32), */
     SDL_AUDIO_F32LE     = 0x8120u,  /**< 32-bit floating point samples */
         /* SDL_DEFINE_AUDIO_FORMAT(1, 0, 1, 32), */
-    SDL_AUDIO_F32BE     = 0x9120u   /**< As above, but big-endian byte order */
+    SDL_AUDIO_F32BE     = 0x9120u,  /**< As above, but big-endian byte order */
         /* SDL_DEFINE_AUDIO_FORMAT(1, 1, 1, 32), */
-} SDL_AudioFormat;
 
-#if SDL_BYTEORDER == SDL_LIL_ENDIAN
-#define SDL_AUDIO_S16    SDL_AUDIO_S16LE
-#define SDL_AUDIO_S32    SDL_AUDIO_S32LE
-#define SDL_AUDIO_F32    SDL_AUDIO_F32LE
-#else
-#define SDL_AUDIO_S16    SDL_AUDIO_S16BE
-#define SDL_AUDIO_S32    SDL_AUDIO_S32BE
-#define SDL_AUDIO_F32    SDL_AUDIO_F32BE
-#endif
+    /* These represent the current system's byteorder. */
+    #if SDL_BYTEORDER == SDL_LIL_ENDIAN
+    SDL_AUDIO_S16 = SDL_AUDIO_S16LE,
+    SDL_AUDIO_S32 = SDL_AUDIO_S32LE,
+    SDL_AUDIO_F32 = SDL_AUDIO_F32LE
+    #else
+    SDL_AUDIO_S16 = SDL_AUDIO_S16BE,
+    SDL_AUDIO_S32 = SDL_AUDIO_S32BE,
+    SDL_AUDIO_F32 = SDL_AUDIO_F32BE
+    #endif
+} SDL_AudioFormat;
 
 
 /**