gitadora: (arena model) flip realtek option (#733)

## Link to GitHub Issue or related Pull Request, if one exists
#730 

## Description of change
Flip the option - enable the Realtek hack by default, unless the user
chooses not to.

## Testing
Tested ASIO path and WASAPI path. WASAPI path should be unaffected as
the game just picks the default audio device.

src/spice2x/launcher/options.h

@@ -117,7 +117,7 @@ namespace launcher {
             GitaDoraArenaSingleWindow,
             GitaDoraArenaWindowLayout,
             GitaDoraArenaAsioDriver,
-            GitaDoraArenaFakeRealtekDevice,
+            GitaDoraArenaRealtekAccess,
             LoadJubeatModule,
             LoadReflecBeatModule,
             LoadShogikaiModule,