spi: fsl-spi: No need to check transfer length versus word size

The verification is already do in the SPI core by function
__spi_validate(), not it to check it again in fsl_spi_bufs().

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Link: https://lore.kernel.org/r/9ace69a8085e22fafd9159e99edd7bbfae2f9940.1680371809.git.christophe.leroy@csgroup.eu
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-fsl-spi.c

@@ -263,18 +263,10 @@ static int fsl_spi_bufs(struct spi_device *spi, struct spi_transfer *t,
 	if (t->bits_per_word)
 		bits_per_word = t->bits_per_word;
 
-	if (bits_per_word > 8) {
-		/* invalid length? */
-		if (len & 1)
-			return -EINVAL;
+	if (bits_per_word > 8)
 		len /= 2;
-	}
-	if (bits_per_word > 16) {
-		/* invalid length? */
-		if (len & 1)
-			return -EINVAL;
+	if (bits_per_word > 16)
 		len /= 2;
-	}
 
 	mpc8xxx_spi->tx = t->tx_buf;
 	mpc8xxx_spi->rx = t->rx_buf;