media: solo6x10: make snd_kcontrol_new const

Make this const as it is only used during a copy operation.
Done using Coccinelle.

Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/pci/solo6x10/solo6x10-g723.c

@@ -319,7 +319,7 @@ static int snd_solo_capture_volume_put(struct snd_kcontrol *kcontrol,
 	return 1;
 }
 
-static struct snd_kcontrol_new snd_solo_capture_volume = {
+static const struct snd_kcontrol_new snd_solo_capture_volume = {
 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 	.name = "Capture Volume",
 	.info = snd_solo_capture_volume_info,