ALSA: hda - Register (new) devices at reconfig

The devices that have been newly added during reconfig must be
registered.  Otherwise they won't be visible to user-space.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/hda/hda_hwdep.c b/sound/pci/hda/hda_hwdep.c
index 300ab40..482fb03 100644
--- a/sound/pci/hda/hda_hwdep.c
+++ b/sound/pci/hda/hda_hwdep.c
@@ -175,7 +175,7 @@
 	err = snd_hda_codec_build_controls(codec);
 	if (err < 0)
 		return err;
-	return 0;
+	return snd_card_register(codec->bus->card);
 }
 
 /*