iio: pressure: zpa2326_spi: remove bits_per_word = 8

Remove setting bits_per_word = 8 from the zpa2326 driver. This is the
default value for SPI transfers, so it is not necessary to explicitly
set it.

Signed-off-by: David Lechner <dlechner@baylibre.com>
Reviewed-by: Nuno Sá <nuno.sa@analog.com>
Link: https://patch.msgid.link/20250505-iio-remove-bits_per_word-8-v1-14-341f85fcfe11@baylibre.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Author: dlech

drivers/iio/pressure/zpa2326_spi.c

@@ -47,7 +47,6 @@ static int zpa2326_probe_spi(struct spi_device *spi)
 	 */
 	spi->mode = SPI_MODE_3;
 	spi->max_speed_hz = min(spi->max_speed_hz, 1000000U);
-	spi->bits_per_word = 8;
 	err = spi_setup(spi);
 	if (err < 0)
 		return err;