[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/ca0106/ca0106_mixer.c b/sound/pci/ca0106/ca0106_mixer.c
index 289f78a..b913a1f 100644
--- a/sound/pci/ca0106/ca0106_mixer.c
+++ b/sound/pci/ca0106/ca0106_mixer.c
@@ -74,8 +74,8 @@
 
 #include "ca0106.h"
 
-static DECLARE_TLV_DB_SCALE(snd_ca0106_db_scale1, -5175, 25, 1);
-static DECLARE_TLV_DB_SCALE(snd_ca0106_db_scale2, -10350, 50, 1);
+static const DECLARE_TLV_DB_SCALE(snd_ca0106_db_scale1, -5175, 25, 1);
+static const DECLARE_TLV_DB_SCALE(snd_ca0106_db_scale2, -10350, 50, 1);
 
 static int snd_ca0106_shared_spdif_info(struct snd_kcontrol *kcontrol,
 					struct snd_ctl_elem_info *uinfo)