[ALSA] opl3 - Fix build errors

I applied a wrong patch for 'opl3 - simplify exclusive access lock'.
Fixed now.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

sound/drivers/opl3/opl3_lib.c

@@ -525,6 +525,7 @@ int snd_opl3_hwdep_new(struct snd_opl3 * opl3,
 	hw->ops.write = snd_opl3_write;
 	hw->ops.release = snd_opl3_release;
 
+	opl3->hwdep = hw;
 	opl3->seq_dev_num = seq_device;
 #if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE))
 	if (snd_seq_device_new(card, seq_device, SNDRV_SEQ_DEV_ID_OPL3,

sound/drivers/opl3/opl3_seq.c

@@ -82,6 +82,7 @@ int snd_opl3_synth_setup(struct snd_opl3 * opl3)
 void snd_opl3_synth_cleanup(struct snd_opl3 * opl3)
 {
 	unsigned long flags;
+	struct snd_hwdep *hwdep;
 
 	/* Stop system timer */
 	spin_lock_irqsave(&opl3->sys_timer_lock, flags);