[ALSA] Add even more 'const' to everything related to TLV

Mark TLV 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/phase.c b/sound/pci/ice1712/phase.c
index 2d97ac8..0751718 100644
--- a/sound/pci/ice1712/phase.c
+++ b/sound/pci/ice1712/phase.c
@@ -697,8 +697,8 @@
 	return 0;
 }
 
-static DECLARE_TLV_DB_SCALE(db_scale_wm_dac, -12700, 100, 1);
-static DECLARE_TLV_DB_SCALE(db_scale_wm_pcm, -6400, 50, 1);
+static const DECLARE_TLV_DB_SCALE(db_scale_wm_dac, -12700, 100, 1);
+static const DECLARE_TLV_DB_SCALE(db_scale_wm_pcm, -6400, 50, 1);
 
 static const struct snd_kcontrol_new phase28_dac_controls[] __devinitdata = {
 	{