[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/aureon.h b/sound/pci/ice1712/aureon.h
index c253b8e..79e58e8 100644
--- a/sound/pci/ice1712/aureon.h
+++ b/sound/pci/ice1712/aureon.h
@@ -38,7 +38,7 @@
 #define VT1724_SUBDEVICE_PRODIGY71LT	0x32315441	/* PRODIGY 7.1 LT */
 #define VT1724_SUBDEVICE_PRODIGY71XT	0x36315441	/* PRODIGY 7.1 XT*/
 
-extern struct snd_ice1712_card_info  snd_vt1724_aureon_cards[];
+extern const struct snd_ice1712_card_info  snd_vt1724_aureon_cards[];
 
 /* GPIO bits */
 #define AUREON_CS8415_CS	(1 << 22)