ALSA: AACI: switch to per-pcm locking

We can use finer-grained locking, which makes things easier when
we gain DMA support.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/arm/aaci.h b/sound/arm/aaci.h
index 924f69c..6a4a2ee 100644
--- a/sound/arm/aaci.h
+++ b/sound/arm/aaci.h
@@ -202,6 +202,7 @@
 struct aaci_runtime {
 	void			__iomem *base;
 	void			__iomem *fifo;
+	spinlock_t		lock;
 
 	struct ac97_pcm		*pcm;
 	int			pcm_open;
@@ -232,7 +233,6 @@
 	struct snd_ac97		*ac97;
 
 	u32			maincr;
-	spinlock_t		lock;
 
 	struct aaci_runtime	playback;
 	struct aaci_runtime	capture;