Remove the usage of deprecated qdoc macros.

QDoc now has support for Doxygen style commands for italics, bold
and list items. This change applies that change in QDoc to the
actual documentation.

Task-number: QTBUG-24578
Change-Id: Iec1c616e0d9a915a31a661916805916e19495dc9
Reviewed-by: Michael Goddard <michael.goddard@nokia.com>

src/imports/audioengine/qdeclarative_soundinstance_p.cpp

@@ -59,7 +59,7 @@ QT_USE_NAMESPACE
     \inherits Item
     \preliminary
 
-    This element is part of the \bold{QtAudioEngine 1.0} module.
+    This element is part of the \b{QtAudioEngine 1.0} module.
 
     There are two ways to create SoundInstance objects. You can obtain it by calling newInstance
     method of Sound element:
@@ -298,9 +298,9 @@ void QDeclarativeSoundInstance::dropInstance()
     This property holds the current playback state. It can be one of:
 
     \list
-    \o StopppedState
-    \o PlayingState
-    \o PausedState
+    \li StopppedState
+    \li PlayingState
+    \li PausedState
     \endlist
 */
 QDeclarativeSoundInstance::State QDeclarativeSoundInstance::state() const