media: cx88: make snd_kcontrol_new const

Make this const as it only passed as the 1st argument to the function
snd_ctl_new1, which is of type const.
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/cx88/cx88-alsa.c

@@ -799,7 +799,7 @@ static int snd_cx88_alc_put(struct snd_kcontrol *kcontrol,
 	return 0;
 }
 
-static struct snd_kcontrol_new snd_cx88_alc_switch = {
+static const struct snd_kcontrol_new snd_cx88_alc_switch = {
 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 	.name = "Line-In ALC Switch",
 	.info = snd_ctl_boolean_mono_info,