iio: adc: ti-tsc2046: 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: Oleksij Rempel <o.rempel@pengutronix.de>
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-v1-11-ebb2d0a24302@baylibre.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Author: dlech

drivers/iio/adc/ti-tsc2046.c

@@ -276,7 +276,7 @@ static int tsc2046_adc_read_one(struct tsc2046_adc_priv *priv, int ch_idx,
 	struct tsc2046_adc_ch_cfg *ch = &priv->ch_cfg[ch_idx];
 	unsigned int val, val_normalized = 0;
 	int ret, i, count_skip = 0, max_count;
-	struct spi_transfer xfer;
+	struct spi_transfer xfer = { };
 	struct spi_message msg;
 	u8 cmd;
 
@@ -314,7 +314,6 @@ static int tsc2046_adc_read_one(struct tsc2046_adc_priv *priv, int ch_idx,
 	/* automatically power down on last sample */
 	tx_buf[i].cmd = tsc2046_adc_get_cmd(priv, ch_idx, false);
 
-	memset(&xfer, 0, sizeof(xfer));
 	xfer.tx_buf = tx_buf;
 	xfer.rx_buf = rx_buf;
 	xfer.len = sizeof(*tx_buf) * max_count;