mfd: twl-core: Constify struct regmap_config and reg_default array

The regmap_config struct may be const because it is not modified by the
driver and regmap_init() accepts pointer to const. Make array of
struct reg_default const as well.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

drivers/mfd/twl-core.c

@@ -207,7 +207,7 @@ static struct twl_mapping twl4030_map[] = {
 	{ 2, TWL5031_BASEADD_INTERRUPTS },
 };
 
-static struct reg_default twl4030_49_defaults[] = {
+static const struct reg_default twl4030_49_defaults[] = {
 	/* Audio Registers */
 	{ 0x01, 0x00}, /* CODEC_MODE	*/
 	{ 0x02, 0x00}, /* OPTION	*/
@@ -306,7 +306,7 @@ static const struct regmap_access_table twl4030_49_volatile_table = {
 	.n_yes_ranges = ARRAY_SIZE(twl4030_49_volatile_ranges),
 };
 
-static struct regmap_config twl4030_regmap_config[4] = {
+static const struct regmap_config twl4030_regmap_config[4] = {
 	{
 		/* Address 0x48 */
 		.reg_bits = 8,
@@ -369,7 +369,7 @@ static struct twl_mapping twl6030_map[] = {
 	{ 1, TWL6030_BASEADD_GASGAUGE },
 };
 
-static struct regmap_config twl6030_regmap_config[3] = {
+static const struct regmap_config twl6030_regmap_config[3] = {
 	{
 		/* Address 0x48 */
 		.reg_bits = 8,
@@ -1087,7 +1087,7 @@ twl_probe(struct i2c_client *client, const struct i2c_device_id *id)
 	struct twl4030_platform_data	*pdata = dev_get_platdata(&client->dev);
 	struct device_node		*node = client->dev.of_node;
 	struct platform_device		*pdev;
-	struct regmap_config		*twl_regmap_config;
+	const struct regmap_config	*twl_regmap_config;
 	int				irq_base = 0;
 	int				status;
 	unsigned			i, num_slaves;