ALSA: cs5535audio: turn off PCM properly if closing the audio device

As per <http://dev.laptop.org/ticket/1420>, we need to properly turn off
the PCM if we're closing the device in order to save power.  This also
causes the MIC led to turn off properly.

Signed-off-by: Jaya Kumar <jayakumar.lkml@gmail.com>
Signed-off-by: Andres Salomon <dilinger@debian.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/cs5535audio/cs5535audio.h b/sound/pci/cs5535audio/cs5535audio.h
index 66bae76..57e9c65 100644
--- a/sound/pci/cs5535audio/cs5535audio.h
+++ b/sound/pci/cs5535audio/cs5535audio.h
@@ -78,6 +78,7 @@
 	unsigned int buf_addr, buf_bytes;
 	unsigned int period_bytes, periods;
 	u32 saved_prd;
+	int pcm_open_flag;
 };
 
 struct cs5535audio {