ALSA: sb: 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>
Link: https://lore.kernel.org/r/20220927141110.18033-1-shangxiaojing@huawei.comSigned-off-by: Takashi Iwai <tiwai@suse.de>

sound/isa/sb/emu8000_pcm.c

@@ -236,7 +236,7 @@ static int emu8k_pcm_open(struct snd_pcm_substream *subs)
 
 	/* use timer to update periods.. (specified in msec) */
 	snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
-				     (1000000 + HZ - 1) / HZ, UINT_MAX);
+				     DIV_ROUND_UP(1000000, HZ), UINT_MAX);
 
 	return 0;
 }