ASoC: constify gpio_chip structures

These structures are only used to copy into other structures, so declare
them as const.

The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@r disable optional_qualifier@
identifier i;
position p;
@@
static struct gpio_chip i@p = { ... };

@ok@
identifier r.i;
expression e;
position p;
@@
e = i@p;

@bad@
position p != {r.p,ok.p};
identifier r.i;
struct gpio_chip e;
@@
e@i@p

@depends on !bad disable optional_qualifier@
identifier r.i;
@@
static
+const
 struct gpio_chip i = { ... };
// </smpl>
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/rt5677.c

@@ -4657,7 +4657,7 @@ static int rt5677_to_irq(struct gpio_chip *chip, unsigned offset)
 	return regmap_irq_get_virq(data, irq);
 }
 
-static struct gpio_chip rt5677_template_chip = {
+static const struct gpio_chip rt5677_template_chip = {
 	.label			= "rt5677",
 	.owner			= THIS_MODULE,
 	.direction_output	= rt5677_gpio_direction_out,

sound/soc/codecs/wm5100.c

@@ -2285,7 +2285,7 @@ static int wm5100_gpio_direction_in(struct gpio_chip *chip, unsigned offset)
 				  (1 << WM5100_GP1_DIR_SHIFT));
 }
 
-static struct gpio_chip wm5100_template_chip = {
+static const struct gpio_chip wm5100_template_chip = {
 	.label			= "wm5100",
 	.owner			= THIS_MODULE,
 	.direction_output	= wm5100_gpio_direction_out,

sound/soc/codecs/wm8903.c

@@ -1830,7 +1830,7 @@ static void wm8903_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
 			   !!value << WM8903_GP1_LVL_SHIFT);
 }
 
-static struct gpio_chip wm8903_template_chip = {
+static const struct gpio_chip wm8903_template_chip = {
 	.label			= "wm8903",
 	.owner			= THIS_MODULE,
 	.request		= wm8903_gpio_request,

sound/soc/codecs/wm8962.c

@@ -3357,7 +3357,7 @@ static int wm8962_gpio_direction_out(struct gpio_chip *chip,
 	return 0;
 }
 
-static struct gpio_chip wm8962_template_chip = {
+static const struct gpio_chip wm8962_template_chip = {
 	.label			= "wm8962",
 	.owner			= THIS_MODULE,
 	.request		= wm8962_gpio_request,

sound/soc/codecs/wm8996.c

@@ -2184,7 +2184,7 @@ static int wm8996_gpio_direction_in(struct gpio_chip *chip, unsigned offset)
 				  (1 << WM8996_GP1_DIR_SHIFT));
 }
 
-static struct gpio_chip wm8996_template_chip = {
+static const struct gpio_chip wm8996_template_chip = {
 	.label			= "wm8996",
 	.owner			= THIS_MODULE,
 	.direction_output	= wm8996_gpio_direction_out,