[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/delta.h b/sound/pci/ice1712/delta.h
index 746ebde..e65d669 100644
--- a/sound/pci/ice1712/delta.h
+++ b/sound/pci/ice1712/delta.h
@@ -46,7 +46,7 @@
 #define ICE1712_SUBDEVICE_MEDIASTATION	0x694c0100
 
 /* entry point */
-extern struct snd_ice1712_card_info snd_ice1712_delta_cards[];
+extern const struct snd_ice1712_card_info snd_ice1712_delta_cards[];
 
 
 /*