libcamera: Drop spurious colon after doxygen \todo directive

The doxygen \todo directive doesn't need to be followed by a colon. Drop
it. While at it, turn one 'todo:' into '\todo'.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Stefan Klug <stefan.klug@ideasonboard.com>

src/libcamera/converter/converter_v4l2_m2m.cpp

@@ -738,7 +738,7 @@ int V4L2M2MConverter::queueBuffers(FrameBuffer *input,
 }
 
 /*
- * \todo: This should be extended to include Feature::Flag to denote
+ * \todo This should be extended to include Feature::Flag to denote
  * what each converter supports feature-wise.
  */
 static std::initializer_list<std::string> compatibles = {

src/libcamera/pipeline/mali-c55/mali-c55.cpp

@@ -1615,7 +1615,7 @@ bool PipelineHandlerMaliC55::registerSensorCamera(MediaLink *ispLink)
 		isp_->frameStart.connect(data->delayedCtrls_.get(),
 					 &DelayedControls::applyControls);
 
-		/* \todo: Init properties. */
+		/* \todo Init properties. */
 
 		if (!registerMaliCamera(std::move(data), sensor->name()))
 			return false;

src/libcamera/pipeline/virtual/config_parser.cpp

@@ -54,7 +54,7 @@ ConfigParser::parseConfigFile(File &file, PipelineHandler *pipe)
 
 		data->config_.id = cameraId;
 		ControlInfoMap::Map controls;
-		/* todo: Check which resolution's frame rate to be reported */
+		/* \todo Check which resolution's frame rate to be reported */
 		controls[&controls::FrameDurationLimits] =
 			ControlInfo(1000000 / data->config_.resolutions[0].frameRates[1],
 				    1000000 / data->config_.resolutions[0].frameRates[0]);