[ALSA] Add 'const' to files in pci/ice1712/

Mark a lot of data as 'const'
Signed-of-by: Philipp Matthias Hahn <pmhahn@pmhahn.de>

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
diff --git a/sound/pci/ice1712/hoontech.h b/sound/pci/ice1712/hoontech.h
index 1ee538b..b62d6e4 100644
--- a/sound/pci/ice1712/hoontech.h
+++ b/sound/pci/ice1712/hoontech.h
@@ -35,7 +35,7 @@
 #define ICE1712_SUBDEVICE_STDSP24_MEDIA7_1	0x16141217	/* Hoontech ST Audio DSP24 Media 7.1 */
 #define ICE1712_SUBDEVICE_EVENT_EZ8		0x00010001	/* A dummy id for EZ8 */
 
-extern struct snd_ice1712_card_info snd_ice1712_hoontech_cards[];
+extern const struct snd_ice1712_card_info snd_ice1712_hoontech_cards[];
 
 
 /* Hoontech SoundTrack Audio DSP 24 GPIO definitions */