ALSA: core: Use DIV_ROUND_UP() instead of open-coding it

Use DIV_ROUND_UP() instead of open-coding it. This documents intent
and makes it more clear what is going on for the casual reviewer.

Generated using the following the Coccinelle semantic patch.

// <smpl>
@@
expression x, y;
@@
-(((x) + (y) - 1) / (y))
+DIV_ROUND_UP(x, y)
// </smpl>
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Link: https://lore.kernel.org/r/20201223172229.781-1-lars@metafoo.deSigned-off-by: Takashi Iwai <tiwai@suse.de>

sound/core/control.c

@@ -836,7 +836,7 @@ static void fill_remaining_elem_value(struct snd_ctl_elem_value *control,
 {
 	size_t offset = value_sizes[info->type] * info->count;
 
-	offset = (offset + sizeof(u32) - 1) / sizeof(u32);
+	offset = DIV_ROUND_UP(offset, sizeof(u32));
 	memset32((u32 *)control->value.bytes.data + offset, pattern,
 		 sizeof(control->value) / sizeof(u32) - offset);
 }
@@ -928,7 +928,7 @@ static int sanity_check_elem_value(struct snd_card *card,
 
 	/* check whether the remaining area kept untouched */
 	offset = value_sizes[info->type] * info->count;
-	offset = (offset + sizeof(u32) - 1) / sizeof(u32);
+	offset = DIV_ROUND_UP(offset, sizeof(u32));
 	p = (u32 *)control->value.bytes.data + offset;
 	for (; offset < sizeof(control->value) / sizeof(u32); offset++, p++) {
 		if (*p != pattern) {

sound/core/seq/seq_memory.c

@@ -290,7 +290,7 @@ int snd_seq_event_dup(struct snd_seq_pool *pool, struct snd_seq_event *event,
 	extlen = 0;
 	if (snd_seq_ev_is_variable(event)) {
 		extlen = event->data.ext.len & ~SNDRV_SEQ_EXT_MASK;
-		ncells = (extlen + sizeof(struct snd_seq_event) - 1) / sizeof(struct snd_seq_event);
+		ncells = DIV_ROUND_UP(extlen, sizeof(struct snd_seq_event));
 	}
 	if (ncells >= pool->total_elements)
 		return -ENOMEM;