ALSA: usb/6fire: fix repeated words in comments

Delete the redundant word 'in'.

Signed-off-by: wangjianli <wangjianli@cdjrlc.com>
Link: https://lore.kernel.org/r/20220724071644.10630-1-wangjianli@cdjrlc.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/usb/6fire/pcm.c

@@ -175,7 +175,7 @@ static int usb6fire_pcm_stream_start(struct pcm_runtime *rt)
 			}
 		}
 
-		/* wait for first out urb to return (sent in in urb handler) */
+		/* wait for first out urb to return (sent in urb handler) */
 		wait_event_timeout(rt->stream_wait_queue, rt->stream_wait_cond,
 				HZ);
 		if (rt->stream_wait_cond)