Added missing QDeclarativeCamera::CaptureViewfinder enum value

Change-Id: I75844e3a943a76649d1b51f0c845a4bf8b200a8e
Reviewed-by: Ling Hu <ling.hu@nokia.com>

src/imports/multimedia/qdeclarativecamera.cpp

@@ -267,6 +267,9 @@ QDeclarativeCamera::Availability QDeclarativeCamera::availability() const
 
     \table
     \header \li Value \li Description
+    \row \li CaptureViewfinder
+         \li Camera is only configured to display viewfinder.
+
     \row \li CaptureStillImage
          \li Prepares the Camera for capturing still images.
 

src/imports/multimedia/qdeclarativecamera_p.h

@@ -118,6 +118,7 @@ class QDeclarativeCamera : public QObject, public QQmlParserStatus
 
 public:
     enum CaptureMode {
+        CaptureViewfinder = QCamera::CaptureViewfinder,
         CaptureStillImage = QCamera::CaptureStillImage,
         CaptureVideo = QCamera::CaptureVideo
     };