ALSA: opl3: Use setup_timer() and mod_timer()

No functional change, refactoring with the standard helpers.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/drivers/opl3/opl3_midi.c b/sound/drivers/opl3/opl3_midi.c
index 6c6d09a..f62780e 100644
--- a/sound/drivers/opl3/opl3_midi.c
+++ b/sound/drivers/opl3/opl3_midi.c
@@ -258,12 +258,10 @@
 	spin_unlock_irqrestore(&opl3->voice_lock, flags);
 
 	spin_lock_irqsave(&opl3->sys_timer_lock, flags);
-	if (again) {
-		opl3->tlist.expires = jiffies + 1;	/* invoke again */
-		add_timer(&opl3->tlist);
-	} else {
+	if (again)
+		mod_timer(&opl3->tlist, jiffies + 1);	/* invoke again */
+	else
 		opl3->sys_timer_status = 0;
-	}
 	spin_unlock_irqrestore(&opl3->sys_timer_lock, flags);
 }
 
@@ -275,8 +273,7 @@
 	unsigned long flags;
 	spin_lock_irqsave(&opl3->sys_timer_lock, flags);
 	if (! opl3->sys_timer_status) {
-		opl3->tlist.expires = jiffies + 1;
-		add_timer(&opl3->tlist);
+		mod_timer(&opl3->tlist, jiffies + 1);
 		opl3->sys_timer_status = 1;
 	}
 	spin_unlock_irqrestore(&opl3->sys_timer_lock, flags);