Fix up a few doc issues

* lingering references to Mobility
* missing group tags on some classes meant they went missing
* put classes into functional groups as well (e.g. audio, camera)
* added some of the qdoc files to OTHER_FILES so they show up in Creator

There are still a lot of warnings since it seems like qdoc is not
processing the controls directory.

Change-Id: I036f8826ae63f8273b3e649cb32c091d964ce830
Reviewed-by: Jonas Rabbe <jonas.rabbe@nokia.com>

src/multimedia/audio/qaudio.cpp

@@ -67,6 +67,7 @@ public:
     \brief The QAudio namespace contains enums used by the audio classes.
     \inmodule QtMultimedia
     \ingroup multimedia
+    \ingroup multimedia_audio
 */
 
 /*

src/multimedia/audio/qaudiodeviceinfo.cpp

@@ -107,6 +107,7 @@ public:
     \brief The QAudioDeviceInfo class provides an interface to query audio devices and their functionality.
     \inmodule QtMultimedia
     \ingroup multimedia
+    \ingroup multimedia_audio
 
     QAudioDeviceInfo lets you query for audio devices--such as sound
     cards and USB headsets--that are currently available on the system.

src/multimedia/audio/qaudioformat.cpp

@@ -107,7 +107,8 @@ public:
     \brief The QAudioFormat class stores audio stream parameter information.
 
     \inmodule QtMultimedia
-    \ingroup  multimedia
+    \ingroup multimedia
+    \ingroup multimedia_audio
 
     An audio format specifies how data in an audio stream is arranged,
     i.e, how the stream is to be interpreted. The encoding itself is

src/multimedia/audio/qaudioinput.cpp

@@ -54,7 +54,8 @@ QT_BEGIN_NAMESPACE
     \brief The QAudioInput class provides an interface for receiving audio data from an audio input device.
 
     \inmodule QtMultimedia
-    \ingroup  multimedia
+    \ingroup multimedia
+    \ingroup multimedia_audio
 
     You can construct an audio input with the system's
     \l{QAudioDeviceInfo::defaultInputDevice()}{default audio input

src/multimedia/audio/qaudiooutput.cpp

@@ -55,7 +55,8 @@ QT_BEGIN_NAMESPACE
     \brief The QAudioOutput class provides an interface for sending audio data to an audio output device.
 
     \inmodule QtMultimedia
-    \ingroup  multimedia
+    \ingroup multimedia
+    \ingroup multimedia_audio
 
     You can construct an audio output with the system's
     \l{QAudioDeviceInfo::defaultOutputDevice()}{default audio output

src/multimedia/audio/qaudiosystem.cpp

@@ -48,6 +48,7 @@ QT_BEGIN_NAMESPACE
     \brief The QAbstractAudioDeviceInfo class is a base class for audio backends.
 
     \ingroup multimedia
+    \ingroup multimedia_audio
     \inmodule QtMultimedia
     \internal
 

src/multimedia/audio/qaudiosystemplugin.cpp

@@ -49,6 +49,7 @@ QT_BEGIN_NAMESPACE
     \brief The QAudioSystemPlugin class provides an abstract base for audio plugins.
 
     \ingroup multimedia
+    \ingroup multimedia_audio
     \inmodule QtMultimedia
     \internal
 

src/multimedia/audio/qsound.cpp

@@ -49,7 +49,7 @@
     \brief The QSound class provides a way to play .wav sound files.
 
     \ingroup multimedia
-
+    \ingroup multimedia_audio
 
     Qt provides the most commonly required audio operation in GUI
     applications: asynchronously playing a sound file. This is most

src/multimedia/audio/qsoundeffect.cpp

@@ -54,6 +54,7 @@ QT_BEGIN_NAMESPACE
     \brief The SoundEffect element provides a way to play sound effects in QML.
 
     \inmodule QtMultimedia
+    \ingroup multimedia_qml
 
     This element is part of the \bold{QtMultimedia 5.0} module.
 
@@ -62,6 +63,17 @@ QT_BEGIN_NAMESPACE
     \snippet doc/src/snippets/multimedia-snippets/soundeffect.qml complete snippet
 */
 
+/*!
+    \class QSoundEffect
+    \brief The QSoundEffect provides a way to play low latency sound effects.
+
+    \ingroup multimedia
+    \ingroup multimedia_audio
+
+*/
+
+
+
 /*!
     \qmlproperty url SoundEffect::source