ALSA: firewire-motu: destroy stream data surely at failure of card initialization

When failing sound card registration after initializing stream data, this
module leaves allocated data in stream data. This commit fixes the bug.

Fixes: 9b2bb4f2 ('ALSA: firewire-motu: add stream management functionality')
Cc: <stable@vger.kernel.org> # v4.12+
Signed-off-by: NTakashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

sound/firewire/motu/motu.c

@@ -128,6 +128,7 @@ static void do_registration(struct work_struct *work)
 	return;
 error:
 	snd_motu_transaction_unregister(motu);
+	snd_motu_stream_destroy_duplex(motu);
 	snd_card_free(motu->card);
 	dev_info(&motu->unit->device,
 		 "Sound card registration failed: %d\n", err);