iio: adc: ti-ads1119: use = { } instead of memset()

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

Signed-off-by: David Lechner <[e-mail]>
Reviewed-by: Francesco Dolcini <[e-mail]>
Reviewed-by: Nuno Sá <[e-mail]>
Reviewed-by: Andy Shevchenko <[e-mail]>
Link: https://patch.msgid.link/20250[e-mail]
Signed-off-by: Jonathan Cameron <[e-mail]>

drivers/iio/adc/ti-ads1119.c

···
 	struct {
 		s16 sample;
 		aligned_s64 timestamp;
-	} scan;
+	} scan = { };
 	unsigned int index;
 	int ret;
-
-	memset(&scan, 0, sizeof(scan));
 
 	if (!iio_trigger_using_own(indio_dev)) {
 		index = find_first_bit(indio_dev->active_scan_mask,