udev: move Discs SD under Devices category

(cherry picked from commit 269e239ff6d1d7bee52462ec819a69b692957901)
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

modules/services_discovery/udev.c

@@ -88,7 +88,7 @@ static int vlc_sd_probe_Open (vlc_object_t *obj)
         vlc_sd_probe_Add (probe, "alsa{longname=\"Audio capture\"}",
                           N_("Audio capture"), SD_CAT_DEVICES);
         vlc_sd_probe_Add (probe, "disc{longname=\"Discs\"}", N_("Discs"),
-                          SD_CAT_MYCOMPUTER);
+                          SD_CAT_DEVICES);
         udev_monitor_unref (mon);
     }
     udev_unref (udev);