libcamera: pipeline_handler: Store the camera manager pointer

Instead of passing the camera manager pointer to the match() function,
and later to more PipelineHandler functions, store it in the
PipelineHandler::manager_ member variable at construction time and
access it from there.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>

src/libcamera/camera_manager.cpp

@@ -98,8 +98,8 @@ int CameraManager::start()
 		 * all pipelines it can provide.
 		 */
 		while (1) {
-			PipelineHandler *pipe = factory->create();
-			if (!pipe->match(this, enumerator_.get())) {
+			PipelineHandler *pipe = factory->create(this);
+			if (!pipe->match(enumerator_.get())) {
 				delete pipe;
 				break;
 			}