ASoC: tlv320aic23: Remove spurious bits per word setting

regmap should handle any byte ordering issues required, it is looking for
a byte stream from the bus, so don't set 16 bits per word. This is likely
to have tested out OK due to use of an unmerged SPI controller driver.
Signed-off-by: Mark Brown <broonie@linaro.org>
Tested-by: Max Filippov <jcmvbkbc@gmail.com>

sound/soc/codecs/tlv320aic23-spi.c

@@ -25,7 +25,6 @@ static int aic23_spi_probe(struct spi_device *spi)
 
 	dev_dbg(&spi->dev, "probing tlv320aic23 spi device\n");
 
-	spi->bits_per_word = 16;
 	spi->mode = SPI_MODE_0;
 	ret = spi_setup(spi);
 	if (ret < 0)