libcamera: device_enumerator: Move lookupDeviceNode() to child classes

The lookupDeviceNode() method is declared as pure virtual in the base
DeviceEnumerator class, but is only called by derived classes. Move it
to the DeviceEnumeratorSysfs and DeviceEnumeratorUdev. This allows
changing the udev version to take a dev_t instead of separate
major/minor, as that's what both the caller and the callee end up using.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>

src/libcamera/device_enumerator.cpp

@@ -306,17 +306,4 @@ std::shared_ptr<MediaDevice> DeviceEnumerator::search(const DeviceMatch &dm)
 	return nullptr;
 }
 
-/**
- * \fn DeviceEnumerator::lookupDeviceNode(int major, int minor)
- * \brief Lookup device node path from device number
- * \param[in] major The device major number
- * \param[in] minor The device minor number
- *
- * Translate a device number given as \a major and \a minor to a device node
- * path.
- *
- * \return the device node path on success, or an empty string if the lookup
- * fails
- */
-
 } /* namespace libcamera */