ALSA: firewire-motu: remove TODO for interaction with userspace about…

… control message

Now UAPI of ALSA firewire stack got enough functions to interact with
userspace for protocol of MOTU FireWire series. Let's remove the relevant
TODO.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Link: https://lore.kernel.org/r/20211029012847.11839-1-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/firewire/motu/amdtp-motu.c

@@ -424,8 +424,6 @@ static unsigned int process_it_ctx_payloads(struct amdtp_stream *s,
 		if (p->midi_ports)
 			write_midi_messages(s, buf, data_blocks);
 
-		// TODO: how to interact control messages between userspace?
-
 		write_sph(p->cache, buf, data_blocks, s->data_block_quadlets);
 	}