iio: chemical: sunrise_co2: use = { } instead of memset()

Use { } instead of memset() to zero-initialize stack memory to simplify
the code.

Signed-off-by: David Lechner <dlechner@baylibre.com>
Reviewed-by: Nuno Sá <nuno.sa@analog.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://patch.msgid.link/20250611-iio-zero-init-stack-with-instead-of-memset-v1-14-ebb2d0a24302@baylibre.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Author: dlech

drivers/iio/chemical/sunrise_co2.c

@@ -51,13 +51,12 @@ static int sunrise_regmap_read(void *context, const void *reg_buf,
 {
 	struct i2c_client *client = context;
 	struct sunrise_dev *sunrise = i2c_get_clientdata(client);
-	union i2c_smbus_data data;
+	union i2c_smbus_data data = { };
 	int ret;
 
 	if (reg_size != 1 || !val_size)
 		return -EINVAL;
 
-	memset(&data, 0, sizeof(data));
 	data.block[0] = val_size;
 
 	/*
@@ -88,14 +87,13 @@ static int sunrise_regmap_write(void *context, const void *val_buf, size_t count
 {
 	struct i2c_client *client = context;
 	struct sunrise_dev *sunrise = i2c_get_clientdata(client);
-	union i2c_smbus_data data;
+	union i2c_smbus_data data = { };
 
 	/* Discard reg address from values count. */
 	if (!count)
 		return -EINVAL;
 	count--;
 
-	memset(&data, 0, sizeof(data));
 	data.block[0] = count;
 	memcpy(&data.block[1], (u8 *)val_buf + 1, count);