media: cx88: use ARRAY_SIZE

Use ARRAY_SIZE instead of dividing sizeof array with sizeof an element
Signed-off-by: Xu Wang <vulab@iscas.ac.cn>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/media/pci/cx88/cx88-mpeg.c

@@ -524,8 +524,7 @@ static int cx8802_request_acquire(struct cx8802_driver *drv)
 		core->last_analog_input = core->input;
 		core->input = 0;
 		for (i = 0;
-		     i < (sizeof(core->board.input) /
-			  sizeof(struct cx88_input));
+		     i < ARRAY_SIZE(core->board.input);
 		     i++) {
 			if (core->board.input[i].type == CX88_VMUX_DVB) {
 				core->input = i;