ASoC: sophgo: fix 64-bit division build failure

cv1800b_adc_setbclk_div() does four 64-bit divisions in a row, which
is rather inefficient on 32-bit systems, and using the plain division
causes a build failure as a result:

ERROR: modpost: "__aeabi_uldivmod" [sound/soc/sophgo/cv1800b-sound-adc.ko] undefined!

Consolidate those into a single division using the div_u64() macro.

Fixes: 4cf8752 ("ASoC: sophgo: add CV1800B internal ADC codec driver")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Link: https://patch.msgid.link/20260202095323.1233553-1-arnd@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>

Author: arndb

sound/soc/sophgo/cv1800b-sound-adc.c

@@ -105,11 +105,8 @@ static int cv1800b_adc_setbclk_div(struct cv1800b_priv *priv, unsigned int rate)
 	if (!priv->mclk_rate || !rate)
 		return -EINVAL;
 
-	tmp = priv->mclk_rate;
-	tmp /= CV1800B_RXADC_WORD_LEN;
-	tmp /= CV1800B_RXADC_CHANNELS;
-	tmp /= rate;
-	tmp /= 2;
+	tmp = div_u64(priv->mclk_rate, CV1800B_RXADC_WORD_LEN *
+		      CV1800B_RXADC_CHANNELS * rate * 2);
 
 	if (!tmp) {
 		dev_err(priv->dev, "computed BCLK divider is zero\n");