[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/emu10k1/p16v.c b/sound/pci/emu10k1/p16v.c
index 5da637c..465f8d5 100644
--- a/sound/pci/emu10k1/p16v.c
+++ b/sound/pci/emu10k1/p16v.c
@@ -785,7 +785,7 @@
 	}
         return change;
 }
-static DECLARE_TLV_DB_SCALE(snd_p16v_db_scale1, -5175, 25, 1);
+static const DECLARE_TLV_DB_SCALE(snd_p16v_db_scale1, -5175, 25, 1);
 
 #define P16V_VOL(xname,xreg,xhl) { \
 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \