tty: vt: do not open code DIV_ROUND_UP()

Use the designated DIV_ROUND_UP() macro instead of explicit addition
with division.

Signed-off-by: Jiri Slaby (SUSE) <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/tty/vt/vt.c

···
 			return ret;
 	}
 
-	c = (font.width+7)/8 * vpitch * font.charcount;
+	c = DIV_ROUND_UP(font.width, 8) * vpitch * font.charcount;
 
 	if (op->data && font.charcount > op->charcount)
 		return -ENOSPC;
···
 		return -EINVAL;
 	if (vpitch < op->height)
 		return -EINVAL;
-	size = (op->width+7)/8 * vpitch * op->charcount;
+	size = DIV_ROUND_UP(op->width, 8) * vpitch * op->charcount;
 	if (size > max_font_size)
 		return -ENOSPC;