regmap-i2c: constify regmap_bus structures

regmap_bus structures are not changed anywhere. Mark them const.
Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Link: https://lore.kernel.org/r/85e4141348db00ecf1f2bc5c2ff6ba3de75e8ff4.1578134920.git.mirq-linux@rere.qmqm.plSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/base/regmap/regmap-i2c.c

@@ -43,7 +43,7 @@ static int regmap_smbus_byte_reg_write(void *context, unsigned int reg,
 	return i2c_smbus_write_byte_data(i2c, reg, val);
 }
 
-static struct regmap_bus regmap_smbus_byte = {
+static const struct regmap_bus regmap_smbus_byte = {
 	.reg_write = regmap_smbus_byte_reg_write,
 	.reg_read = regmap_smbus_byte_reg_read,
 };
@@ -79,7 +79,7 @@ static int regmap_smbus_word_reg_write(void *context, unsigned int reg,
 	return i2c_smbus_write_word_data(i2c, reg, val);
 }
 
-static struct regmap_bus regmap_smbus_word = {
+static const struct regmap_bus regmap_smbus_word = {
 	.reg_write = regmap_smbus_word_reg_write,
 	.reg_read = regmap_smbus_word_reg_read,
 };
@@ -115,7 +115,7 @@ static int regmap_smbus_word_write_swapped(void *context, unsigned int reg,
 	return i2c_smbus_write_word_swapped(i2c, reg, val);
 }
 
-static struct regmap_bus regmap_smbus_word_swapped = {
+static const struct regmap_bus regmap_smbus_word_swapped = {
 	.reg_write = regmap_smbus_word_write_swapped,
 	.reg_read = regmap_smbus_word_read_swapped,
 };
@@ -197,7 +197,7 @@ static int regmap_i2c_read(void *context,
 		return -EIO;
 }
 
-static struct regmap_bus regmap_i2c = {
+static const struct regmap_bus regmap_i2c = {
 	.write = regmap_i2c_write,
 	.gather_write = regmap_i2c_gather_write,
 	.read = regmap_i2c_read,
@@ -239,7 +239,7 @@ static int regmap_i2c_smbus_i2c_read(void *context, const void *reg,
 		return -EIO;
 }
 
-static struct regmap_bus regmap_i2c_smbus_i2c_block = {
+static const struct regmap_bus regmap_i2c_smbus_i2c_block = {
 	.write = regmap_i2c_smbus_i2c_write,
 	.read = regmap_i2c_smbus_i2c_read,
 	.max_raw_read = I2C_SMBUS_BLOCK_MAX,