iio: light: ltr501: 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-v1-19-ebb2d0a24302@baylibre.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Author: dlech

drivers/iio/light/ltr501.c

@@ -1279,14 +1279,12 @@ static irqreturn_t ltr501_trigger_handler(int irq, void *p)
 	struct {
 		u16 channels[3];
 		aligned_s64 ts;
-	} scan;
+	} scan = { };
 	__le16 als_buf[2];
 	u8 mask = 0;
 	int j = 0;
 	int ret, psdata;
 
-	memset(&scan, 0, sizeof(scan));
-
 	/* figure out which data needs to be ready */
 	if (test_bit(0, indio_dev->active_scan_mask) ||
 	    test_bit(1, indio_dev->active_scan_mask))