iio: pressure: mpl3115: 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-v1-24-ebb2d0a24302@baylibre.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Author: dlech

drivers/iio/pressure/mpl3115.c

@@ -160,7 +160,7 @@ static irqreturn_t mpl3115_trigger_handler(int irq, void *p)
 	 * of the buffer may be either 16 or 32-bits.  As such we cannot
 	 * use a simple structure definition to express this data layout.
 	 */
-	u8 buffer[16] __aligned(8);
+	u8 buffer[16] __aligned(8) = { };
 	int ret, pos = 0;
 
 	mutex_lock(&data->lock);
@@ -170,7 +170,6 @@ static irqreturn_t mpl3115_trigger_handler(int irq, void *p)
 		goto done;
 	}
 
-	memset(buffer, 0, sizeof(buffer));
 	if (test_bit(0, indio_dev->active_scan_mask)) {
 		ret = i2c_smbus_read_i2c_block_data(data->client,
 			MPL3115_OUT_PRESS, 3, &buffer[pos]);