ASoC: wm8978: Use DIV_ROUND_UP() instead of open-coding it

Use DIV_ROUND_UP() instead of open-coding it, which intents and makes it
more clear what is going on for the casual reviewer.

The Coccinelle references Commit e4d8aef2 ("ALSA: usb: Use
DIV_ROUND_UP() instead of open-coding it").
Signed-off-by: Shang XiaoJing <shangxiaojing@huawei.com>
Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20220927140948.17696-3-shangxiaojing@huawei.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/wm8978.c

@@ -498,7 +498,7 @@ static int wm8978_configure_pll(struct snd_soc_component *component)
 
 		if (4 * f_opclk < 3 * f_mclk)
 			/* Have to use OPCLKDIV */
-			opclk_div = (3 * f_mclk / 4 + f_opclk - 1) / f_opclk;
+			opclk_div = DIV_ROUND_UP(3 * f_mclk / 4, f_opclk);
 		else
 			opclk_div = 1;