libcamera: camera_sensor: Access entity directly

The CameraSensor::logPrefix() function accesses the entity from the
subdev. Remove the level of indirection as we stored a pointer to the
entity internally.

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

src/libcamera/camera_sensor.cpp

@@ -539,7 +539,7 @@ int CameraSensor::sensorInfo(CameraSensorInfo *info) const
 
 std::string CameraSensor::logPrefix() const
 {
-	return "'" + subdev_->entity()->name() + "'";
+	return "'" + entity_->name() + "'";
 }
 
 } /* namespace libcamera */