iio: pressure: bmp280-spi: remove bits_per_word = 8

Remove setting bits_per_word = 8 from the bmp280 driver. This is the
default value for SPI transfers, so it is not necessary to explicitly
set it.

Since no other SPI settings are changed, we can also remove the call to
spi_setup().

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-v1-12-341f85fcfe11@baylibre.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Author: dlech

drivers/iio/pressure/bmp280-spi.c

@@ -81,14 +81,6 @@ static int bmp280_spi_probe(struct spi_device *spi)
 	const struct bmp280_chip_info *chip_info;
 	struct regmap_bus const *bmp_regmap_bus;
 	struct regmap *regmap;
-	int ret;
-
-	spi->bits_per_word = 8;
-	ret = spi_setup(spi);
-	if (ret < 0) {
-		dev_err(&spi->dev, "spi_setup failed!\n");
-		return ret;
-	}
 
 	chip_info = spi_get_device_match_data(spi);