sound: Deparenthesize negative error returns

Make the returns a bit more kernel standard style.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/oss/v_midi.c b/sound/oss/v_midi.c
index f0b4151..fc0ba27 100644
--- a/sound/oss/v_midi.c
+++ b/sound/oss/v_midi.c
@@ -49,13 +49,13 @@
 	unsigned long flags;
 
 	if (devc == NULL)
-		return -(ENXIO);
+		return -ENXIO;
 
 	spin_lock_irqsave(&devc->lock,flags);
 	if (devc->opened)
 	{
 		spin_unlock_irqrestore(&devc->lock,flags);
-		return -(EBUSY);
+		return -EBUSY;
 	}
 	devc->opened = 1;
 	spin_unlock_irqrestore(&devc->lock,flags);