ALSA: ad1816a: enable hardware timer

Enable hardware timer with 10 usec resolution.

Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/isa/ad1816a/ad1816a.c b/sound/isa/ad1816a/ad1816a.c
index 3810833..15f6010 100644
--- a/sound/isa/ad1816a/ad1816a.c
+++ b/sound/isa/ad1816a/ad1816a.c
@@ -156,6 +156,7 @@
 	struct snd_card_ad1816a *acard;
 	struct snd_ad1816a *chip;
 	struct snd_opl3 *opl3;
+	struct snd_timer *timer;
 
 	if ((card = snd_card_new(index[dev], id[dev], THIS_MODULE,
 				 sizeof(struct snd_card_ad1816a))) == NULL)
@@ -194,6 +195,12 @@
 		return error;
 	}
 
+	error = snd_ad1816a_timer(chip, 0, &timer);
+	if (error < 0) {
+		snd_card_free(card);
+		return error;
+	}
+
 	if (mpu_port[dev] > 0) {
 		if (snd_mpu401_uart_new(card, 0, MPU401_HW_MPU401,
 					mpu_port[dev], 0, mpu_irq[dev], IRQF_DISABLED,