ALSA: ice1712: add const to snd_ak4xxx_private structures

Declare snd_ak4xxx_private structures  as const as they are only passed
to the function snd_ice1712_akm4xxx_init. This argument is of type const,
so make the structures const.
Done using Coccinelle:

@match disable optional_qualifier@
identifier s;
position p;
@@
static struct snd_ak4xxx_private s@p={...};

@good1@
identifier match.s;
position p;
@@
snd_ice1712_akm4xxx_init(...,&s@p,...)

@bad@
identifier match.s;
position p!={match.p,good1.p};
@@
s@p

@depends on !bad disable optional_qualifier@
identifier match.s;
@@
static
+const
struct snd_ak4xxx_private s={...};

Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/ice1712/revo.c

@@ -244,7 +244,7 @@ static struct snd_akm4xxx akm_revo_front = {
 	.dac_info = revo71_front,
 };
 
-static struct snd_ak4xxx_private akm_revo_front_priv = {
+static const struct snd_ak4xxx_private akm_revo_front_priv = {
 	.caddr = 1,
 	.cif = 0,
 	.data_mask = VT1724_REVO_CDOUT,
@@ -266,7 +266,7 @@ static struct snd_akm4xxx akm_revo_surround = {
 	.dac_info = revo71_surround,
 };
 
-static struct snd_ak4xxx_private akm_revo_surround_priv = {
+static const struct snd_ak4xxx_private akm_revo_surround_priv = {
 	.caddr = 3,
 	.cif = 0,
 	.data_mask = VT1724_REVO_CDOUT,
@@ -287,7 +287,7 @@ static struct snd_akm4xxx akm_revo51 = {
 	.dac_info = revo51_dac,
 };
 
-static struct snd_ak4xxx_private akm_revo51_priv = {
+static const struct snd_ak4xxx_private akm_revo51_priv = {
 	.caddr = 2,
 	.cif = 0,
 	.data_mask = VT1724_REVO_CDOUT,
@@ -305,7 +305,7 @@ static struct snd_akm4xxx akm_revo51_adc = {
 	.adc_info = revo51_adc,
 };
 
-static struct snd_ak4xxx_private akm_revo51_adc_priv = {
+static const struct snd_ak4xxx_private akm_revo51_adc_priv = {
 	.caddr = 2,
 	.cif = 0,
 	.data_mask = VT1724_REVO_CDOUT,
@@ -355,7 +355,7 @@ static struct snd_akm4xxx akm_ap192 = {
 	.dac_info = ap192_dac,
 };
 
-static struct snd_ak4xxx_private akm_ap192_priv = {
+static const struct snd_ak4xxx_private akm_ap192_priv = {
 	.caddr = 2,
 	.cif = 0,
 	.data_mask = VT1724_REVO_CDOUT,