[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/juli.h b/sound/pci/ice1712/juli.h
index d9f8534..1b9294f 100644
--- a/sound/pci/ice1712/juli.h
+++ b/sound/pci/ice1712/juli.h
@@ -5,6 +5,6 @@
 
 #define VT1724_SUBDEVICE_JULI		0x31305345	/* Juli@ */
 
-extern struct snd_ice1712_card_info  snd_vt1724_juli_cards[];
+extern const struct snd_ice1712_card_info  snd_vt1724_juli_cards[];
 
 #endif	/* __SOUND_JULI_H */