libcamera: pipeline_handler: Rename handlers() method to factories()

The PipelineHandlerFactory::handlers() static method returns a list of
factories, not a list of handlers. Rename it accordingly.

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

src/libcamera/include/pipeline_handler.h

@@ -39,7 +39,7 @@ public:
 	const std::string &name() const { return name_; }
 
 	static void registerType(PipelineHandlerFactory *factory);
-	static std::vector<PipelineHandlerFactory *> &handlers();
+	static std::vector<PipelineHandlerFactory *> &factories();
 
 private:
 	std::string name_;